Do-it-yourself partial bumper repair

In detail: do-it-yourself partial bumper repair from a real master for the site my.housecope.com.

Often in the traffic flow you can find a car with a cracked or deformed buffer. What can you do, no one is safe from unsuccessful parking or a minor accident. However, this is not a reason to continue driving a car that has lost its "shiny" appearance - there is a practical experience of restoring the original state of this element.

The external plastic components are mainly made of thermoplastic plastics. The technology for restoring such products is based on welding, it is this technology that allows you to get rid of through cracks and even recreate broken fasteners. Actually, the procedure is not much more complicated than preparing and spray paint damaged area of the car body.

Some car enthusiasts assure us that we repair the bumper with our own hands using metal brackets. But the experienced car owner knows that like is treated like this, that is, repair plastic rods are used for soldering. Their composition, color and profile are different; the required core is selected according to the marking on the buffer.

Making the right choice means guaranteeing a high-quality repair, because the mismatch of materials will significantly reduce the life of the automotive element. To find out what the cracked bumper is made of, it is enough to carefully examine the inside of the part. Depending on the marking, the following conclusions are drawn:

PP - polypropylene base.
ABS (GF, PAG 6) are hard plastics.
PUR - polyurethane.

Plastic welding requires high temperatures, for example, 400-450 ° C is suitable for propylene, and 500 ° C is necessary to restore an ABS structure. Many car owners will learn how to repair a bumper with their own hands in a video where craftsmen use an ordinary 100 W soldering iron.

Video (click to play).

You can also restore a damaged part using pieces from a bumper with a similar marking. They are cut into strips 8 mm wide for PUR, and 4-5 mm for polypropylene.

Almost any breakdowns are treated by welding, even broken parts are reanimated. However, no one canceled the economic feasibility of such work, because the restoration of numerous defects can hardly be called justified. The cost of a complete restoration and staining will be more expensive than a new buffer.

Certain tools are required to complete the repair. These can be both ordinary household appliances and professional tools. The ideal kit includes the following items:

Orbital sander or sanding block.
Grinding wheels of various grain sizes.
Mini drill like Dremel or drill.
Clamps and rubber spatula.
Soldering iron and hair dryer.
Metallic tape.

Of the materials for restoring a cracked buffer, you may need:

Putty and primer.
Brass mesh for crack reinforcement.
A can of paint or a can of paint.
Plastic repair rods of the required configuration and composition.

The damaged part must be dismantled in order to eliminate, firstly, excessive stress in the crack area. Those who have already done such work will say that now we clean the bumper and only then repair it with our own hands.

The cracked parts fit together. For reliability, they are fixed with metal tape from the outside of the part. If the breaks are quite significant, then clamps will be needed to clamp the edges of the cracks. Their number depends on the complexity of the repair.

When restoring PP-based parts, the reinforcing mesh is not used. The process begins with the fact that a nozzle with a nozzle with a diameter of 5-7 mm is installed on the hair dryer. In the future, work is carried out according to the following points:

On the inside of the buffer along the crack joint, use a Dremel mini-drill to make a groove for the plastic rod.
Using a hair dryer, melt and place the repair rod into the prepared groove.
Clean the front part of the bumper with an orbital sander with P240 attachment and repeat the welding procedure similarly to the operation on the inside.
Grind the cooled seam from the outside with a nozzle with the same grit P240, then remove dust from the surface.

Even out irregularities with a special putty for plastic, try to keep the layer as small as possible.
Dilute the primer with solvent 3: 1 and apply two coats to the degreased surface. Drying time for the first layer is 15 minutes.
Apply a developing layer in a contrasting color, followed by sanding with a disc or sandpaper with grit P800 and P1000.
Eliminate the detected defects with a nitro putty followed by sanding with P1000 sandpaper.
Remove dust with a damp cloth and degrease the part, then paint plastic decorative paint with overlapping borders 50-100 mm. Apply the paint in 3-4 coats with intermediate drying cycles.

Anyone who is interested in how to properly repair a bumper in a video with their own hands should take into account an important detail. 30-40 minutes after applying the last layer of paint, the part should be varnished. Thus, we get a flawless appearance of the repaired part. Do not forget to follow a few simple rules:

You should try to apply a minimum layer of putty.
Take a temporary pause for complete hardening of the putty layer.
To process the putty area with a grinding wheel or sandpaper with grit P800, and then - P1000.
It is desirable to apply a developing layer of primer.

In the case of a polyurethane buffer, the preparatory stage in the form of grooving work is excluded. A brass reinforcing mesh is applied to the crack; steel is not recommended for use, because it is prone to corrosion. Alternatively, stapling staples can be used every 10-20 mm. They are recessed into the body of the part across the seam, it is imperative to make sure that the bracket does not go through the part.

Further, the repair technology does not differ from the restoration of a polypropylene part. Wire mesh or staplers should be sunk into the plastic. Only after that, the seam is filled with repair plastic and soldered from the opposite side. Some important points of technology should be taken into account:

It is necessary to solder the mesh or staples carefully so as not to overheat the plastic, otherwise it may deform from the opposite side.
For a complete DIY repair of a polyurethane bumper, the width of the reinforcing mesh should be 15-20 mm.
It is better to press in the mesh or staples with a flat object.
If the legs of the staples pierce the plastic through and through, then they should be shortened using side cutters.
For the convenience of working with metal elements, you can use tweezers.
To prevent the new enamel from peeling off, it is necessary to grind the paint over the entire plane of the part.

Puttying and painting are performed in the same way as described above - according to the traditional scheme. Repair work on the restoration of the buffer can be combined with painting the car , so the consumption of materials will be more rational. It is important to determine in advance the feasibility of carrying out restoration work. If there are significant costs in the future, then it is better to buy a new part.

The most common way to repair a bumper is to paint it. You can do it at a service station, or you can do it yourself.We will tell you how to solve this problem on your own and what you need for this.

You can paint the bumper yourself, saving a lot of money.

Most often, it is required to paint the bumper in the following cases:

The most common reason for this procedure is that the car is no longer in the best condition, it is outdated. The age of the vehicle affects the overall paint finish, including the aforementioned unit.
The second common problem occurs when collisions and bumper damage - in general, this is the part of the car that suffers the most. But painting will be required if the bumper is not badly broken and it is suitable for this.
After buying a brand new car, drivers do not notice the quality of painting on the purchased car. After some time, the paint begins to peel off, which indicates the third reason to paint on your own - negligence in painting at the factory.

You will find detailed information on repairing plastic bumpers in this article.

Here you will learn how to proceed if a creak is heard when turning the steering wheel.

There are several types of bumper paint:

Cheap procedure using paint brush... This option is suitable for motorists who do not have a compressor, spray gun at home, money and the desire to take the car to the workshop. This method is better suited for painting small areas rather than completely. The quality of the result of this method is the worst, more suitable for cheap cars.
Spray painting... Also a simple method, but of a better quality than using a brush. Cash costs for spray paint are also not very high. Ideal for painting small areas of damaged bumper and full-scale painting.
Painting with high-quality paints using a spray gun... This method is the best, it is used mainly in high-quality auto repair shops. The costs for it will be rather big, but the quality will be at the highest level. It is the most common and well-known method. More suitable for full bumper painting.

In terms of painting the bumper, the preparation of tools and materials plays an important role.

Here's what you need for the work ahead:

Various degreasers;
Primer (primer);
Putty (the presence of fiberglass in it is better);
"Sandpaper" is used before and after the primer. Markings - 120,220,500,800;
Grinder, any block;
Spray gun (spray gun) or paint can;

We will tell you in stages what you need to do to paint the bumper on your own.

Bumper preparation.

Dried tar is carefully removed from the bumper - this process is necessary to minimize the likelihood of contamination of the grinding wheel with resin.

If you do not want the result of painting to please you, try to forget about the rush.

It is better to repeat this procedure until the perfect result, it implies the removal of visible and felt defects.

This is followed by matting, to prepare the bumper before using an acrylic primer, sanding the surface after coarse sandpaper. Used sandpaper with a grain of 240. Absolutely the entire surface of the bumper we grind, using either hands or a grinder. Do not work with the rough sole of the machine, as a result, you may get an uneven edge on the bumper. To avoid such problems, foam rubber is used, which sticks to the sole, holding the circle (a sandwich in the common people).

Further, with the help of a compressor, the entire bumper is blown, while omissions must not be allowed. Using chemical solutions, we degrease the treated area of the bumper and treat it with anti-silicone. The preparation of the bumper is now complete.

Acrylic primer. First put on a breathing mask and goggles. Then we process the bumper with several layers of soil on the plastic. During its short drying, we rinse the gun and prepare the consistency from acrylic primer.

We start priming. The application of the primer takes place in stages. Initially, we apply one layer of primer to the surface of the bumper, then several more times to level the wrong places, using drying between processes. Each coat should be applied after matting the previous application.

Fill the bumper already primed with several layers with the final layer. The primer for the last pouring should not be thick, with the help of a solvent you can fix this. When the last layer dries, the coating will not be rough and easier to work with.

Grinding the primer. It costs a day to wait for complete drying. If you have a device with infrared heating, it will be done in 3 hours. Waiting all day is a waste of time, which means it is better to purchase the necessary equipment. A huge positive effect of infrared drying is the complete warming up of all layers of the coating.

Next comes the grinding of the soil. A machine, sticks and paper with a fine coating 320-400 will come in handy. When using a developing powder, the result will be better.

When sanding, we remove the bulges, compare the gaps in the putty, make the surface smoother after abrading by 400.

After that, there is a re-priming, followed by processing with an abrasive paper for 500, blowing and degreasing.

Painting directly. First, the bumper is treated with several layers of pigment, while drying is not forgotten. Perhaps small debris and dust will get to the surface. Then the dry surface should be wiped with interlayer paper. After the varnish is used, a couple of layers are applied and dried. Painting finished.

Remember to take care of your protective equipment before painting.

The process also takes place after the aforementioned procedures. Shake the can thoroughly for at least 3 minutes! Determine the best spray distance and apply layers. Wait about half an hour before applying another coat.

Peculiarities:

Don't overdo it with a sander!
Avoid smudges when painting, a thinner layer is better.
Use a variety of preparations to add to the soil.
You can't overdo it with the soil, it's not plasticine!
Perform painting in a ventilated area and wearing a mask.

This video tutorial may also help you:

The price of painting the bumper will depend on:

Type of painting
Paint quality
Bumper condition (full or partial)

Every day in the world there are accidents, various emergencies, after which you need to repaint the bumper, which took the whole blow. With the help of these instructions, the quality of the new bumper is guaranteed.

Correctly selected tools are very important for successful painting. There is a specific list to follow:

If there are large cracks on the machine, we need a high power soldering iron. Such a tool is ideal for working with plastic, since the vast majority of modern bumpers are made of this material.
You will need a paint thinner to remove the excess. It is perfectly acceptable to use white spirit for our purposes.
Sealing defects requires a primer and putty.
You will also need acrylic paint, as this is the best way to hide bumps. This is especially true if nitro-enamels are used - in this case, surface treatment is of great importance.
Do not forget to stock up on sandpaper - it is advisable to purchase several types of different grain sizes.
You will also need anti-silicone and an infrared heater.
To polish the surface, you will need to buy a varnish.
There may be a need for a "sandwich" - special transitional pillows that are installed between the sole of the machine and the abrasive wheel.
In addition, work clothes, a mask to protect the respiratory tract and sealed goggles are required, because you will be dealing with quite toxic substances that can harm your skin.

In order for the final result to be no different from the work of a specialist in a car workshop, special attention should be paid to the selection of a shade that does not differ from the main color of the bumper. The modern market offers more than 80 varieties of various chemicals and pigments that help to perfectly mask the restoration site. With the right ratio and careful application, it is quite possible to achieve a professional effect. Moreover, for these purposes, special computer programs have already been invented, which independently carry out the selection of the necessary compositions.

After preparing all the necessary tools and materials, you can proceed directly to work with the car. As with any repair process, local bumper painting begins with preparation.

I would like to remind you once again that bumper repair without removing it is carried out only in case of minor superficial damage. In other options, the dismantling of the part is required, followed by the sealing of the cracks or the reduction of the fallen off elements. Here it is better to entrust the car in the hands of professionals, because a crushed part requires truly experienced hands.

But this is not our case, and therefore, preparation is greatly simplified.

First you need to clean the surface well. Please note that not only the area to be restored is cleaned, but the entire bumper. To do this, you will need a soft sponge or cloth, as well as a powder with fine abrasive particles or a special car detergent.
On the trunk, tar stains and other complex contaminants can be found that cannot be washed off with ordinary means. In this case, use a small amount of solvent, for example, the same white spirit.
After the bumper is completely cleaned and degreased, you can start sanding the damaged surface. In the process, it is very important to achieve absolute smoothness, for which a sander is used. This is necessary so that further layers lay on the bumper absolutely evenly and so that the defect is completely smoothed out. If the scratches are found in places where the machine cannot reach, then you have to work with your hands using fine-grained sandpaper.
However, trying too hard is also not worth it, as the part can become thinner and more damaged. An overly worn area can deform over time, or even burst altogether. Then replacement of the bumper will be inevitable.

At the end of sanding, you need to blow off the dust or brush it off with a piece of cloth. Carefully inspect the surface to be treated - it should be absolutely smooth during tactile and visual inspection. After the normal base is prepared, you can proceed to the main stages of work - putty and primer on the bumper, which is followed directly by painting the car.

The smooth surface makes the irregularities visible and makes it easier to repair them. For this, putty is needed - it recreates the previous shape of the part. In this case, undamaged areas do not need to be processed. For greater efficiency, you can dilute the filler with glass wool. After processing, we thoroughly sand the area. After the first layer, you need to apply a second, thinner one, and also sand it.All flaws are carefully processed with a special nozzle of a grinding machine, and in hard-to-reach places they are rubbed with the same sandpaper. Then the bumper is degreased and you can proceed to applying the primer.

Priming is the last step before paint is applied. It is necessary to treat with a primer in two layers, each of which takes about a quarter of an hour to dry. As for the tool itself, there are both ready-made compositions and substances that require preliminary preparation on sale. In order to understand which of them fell into your hands, you just need to read the instructions.

Next, you should leave the bumper to dry for about a day. To determine if any defects have remained as a result, you should use a special developing agent, which is sold in powder form. You can also look for a developer in the form of an aerosol, depending on which type is more convenient for you to use. With its help, you can pinpoint the flaws in your work and repair them even before applying paint. The principle of the developer is such that it settles in places that require correction.

Some problematic grooves can be fixed with a nitro filler. If you accidentally overdid it in the process, it is advisable to increase the amount of primer to repair the problem area.

When the freshly corrected areas are completely hardened, you can proceed to staining them. Since drying takes some time, the part will need to be cleaned and degreased again. Experts say that the paint falls more evenly on a slightly heated surface. That is why painting is best done in direct sunlight. At the same time, the bumper should not overheat too much, as this may slightly worsen the final result. Therefore, a closed sunny room is ideal for painting, and in the absence of such, you can use an ordinary building hair dryer. In addition, in order to prevent dust from settling on the painted area, it is better to moisten the air a little beforehand.

In specialized stores for applying car paint, pistols are sold and for high-quality restoration it is better to get hold of one. In general, the staining process is as follows:

First you need to make a simple small stencil around the perimeter of the spot to be painted. This is to keep paint away from the rest of the bumper.
In addition to a gun, a spray can or a spray installation is suitable for processing - this way the color is more uniform.
Coloring is done in layers, in two or three layers. Each of them needs time to dry - 15-20 minutes. You should not rush, because too much dry paint can provoke the appearance of smudges and clots.
Next, two layers of varnish are applied - an interval of about 20 minutes is also required between them.
When painting the bumper locally, the tone must be applied pointwise, but painting the entire bumper is a very important point.

After painting is completed, the bumper must be properly dried.

Air mobility and ambient temperature play a major role in the speed and efficiency of car paint drying. If the air remains stationary, it can drag out the drying process for a long time. That is why there are several effective ways to shorten this period.

In large auto repair shops, special drying chambers are used; they are thermo-radiation, convection, and also of a mixed type. These chambers provide a fast transfer of energy, resulting in significantly shorter drying times.
For smaller events, spot drying is used, which is carried out using reflectors, various lamps and other devices.When using such a local effect, it is important to keep an eye on the distance between the drying part and the dryer.
Infrared drying is also a fairly effective method to speed up the drying process. Most of these modules are used for processing vertical surfaces and are powered from the mains.

Of course, having any of these devices provides an additional advantage, but simple drying in a warm, dry and ventilated area can be a good solution. When the paint has finally hardened, you can safely start operating the car and not be afraid of minor damage to the bumper - because now you know how to quickly and effectively get rid of them.

In this video, you can watch the bumper painting procedure on a Porsche Cayenne.

It is quite difficult to imagine a vehicle that does not have such a necessary element as a bumper. The main purpose of the part is to protect the body from damage and deformation. When a difficult situation arises, he takes on all the shock and damaging factors. It is for this reason that the question of how to repair a plastic bumper with your own hands is one of the most relevant.

It is easy to guess that the bumper with a high degree of probability can be damaged if the car is used quite intensively and even with very careful operation. The bumper can be damaged not only due to lack of driving experience, but for reasons such as:

actions of other sloppy and inexperienced drivers;
departure of small stones from the movement of other vehicles.

Regardless of the cause and nature of the damage, the appearance of the vehicle after a bumper breakage deteriorates significantly. The car owner automatically wants to solve a similar problem by doing a bumper repair with his own hands.

Ways to eliminate the problem and mechanical damage directly depend on what kind of plan the defect was applied to the car part. Among the most basic types of damage are:

Scratches, which can be superficial and deep, that is, reaching the ground or to the base layer of the part. This damage must be repaired immediately, as later cracks may appear at the scratch site.
Cracks - this is a more serious damage to a car part, which belongs to the category of dangerous. Without removing it, it is not recommended to operate the machine.
Dents - are formed by a strong mechanical effect on the bumper. These injuries are very often accompanied by other adverse manifestations. Scratches and cracks almost always appear next to dents.
Chips and breakouts... This is a special through damage that has a fairly large area. They appear most often at the edges of the bumper after a collision of the car with a certain obstacle.

Of course, you can contact any service center, but in this case, the cost of restoring the bumper, even with minor damage, becomes much higher than the cost. Of all the options listed above, it is self-repair that will become the optimal and affordable method for restoring the bumper.

Directly depending on the degree of damage, repair work aimed at restoring the bumper can be divided into local and complex ones. Scratches and small chips of various types on the surface of the paint-and-lacquer coating can be eliminated without preliminary dismantling of the part.

It is necessary to work with this element so that access to the outer and inner surfaces of the element is provided. The installation of the part in its original place is carried out after the implementation of the required repair and restoration work.

When carrying out a process such as self-repairing a plastic bumper, you will need to prepare special tools and materials.Among the most important of them are:

Competently thought-out protection will comprehensively protect the respiratory organs, eyes and hands from the effects. This is an automatic guarantee that the body will not be harmed by the spraying of harmful substances in the air and by high temperatures.

Along with the acquisition of the necessary materials and tools, in the preparation process, you need to carry out certain work with the bumper itself. Among the most important points are:

Removing the bumper from the car body.
Thorough cleaning of the part from dirt and dust. The surface must be dry and clean.
Determination of the material from which the bumper is made.
In areas where restoration work will be carried out on the bumper, it is imperative to remove the applied paint. It is necessary to thoroughly clean and degrease not only the damaged area itself, but also the adjacent space.
The crack must be drilled with small through holes at the ends before repairing. This will avoid the subsequent spread of damage, its increase in size.
Any crack has special joint edges. Therefore, before repairing the crack, it will need to be filled at the joints with a special composite.

After completing all the above processes and manipulations, you can start repairing the bumper with your own hands.

The scheme according to which the repair of plastic bumpers will be carried out depends directly on the degree and level of damage. The following recovery techniques may be applicable:

Gluing - used for parts produced by cold forming. A special polyurethane-based adhesive is used here.
Heat sealing - Suitable for bumpers that have been hot formed. The bumper fragments are connected using special welding equipment.
Lamination - the method is suitable for restoring lost fragments similar. It uses a special reinforcing mesh and putty.
Using flat electrodes... The technique is based on the use of a special construction hair dryer, which melts the electrodes and effectively repairs cracks.
Soldering - the best option for repairing a bumper at normal home conditions. You will need to use a soldering iron, sandpaper and paint.
Brazing with reinforcement - suitable for the elimination of large cracks. The process is based on the use of double-sided soldering and simultaneous reinforcement with special staples or metal mesh.
Pasting - crack elimination is carried out with fiberglass and epoxy glue. The restoration material is applied to the glue and strictly on both sides of the bumper.

Below is a description of the most common and labor-intensive methods of restoring a car bumper, depending on the damage caused.

The previously prepared putty must be prepared according to all the rules of the instructions, add a special hardener there. After that, the resulting mass is applied to the area of the bumper where the damage is located. You need to wait about 10 minutes, take sandpaper No. 80 and grout the composition with special circular movements. The result becomes visible after several manipulations.

Priming work is carried out just as easily. It is required to take a prepared rag and rinse the bumper very well. Once the surface is dry, the entire bumper should be inspected for correct shapes. If there are no dents, you can start priming. This process is carried out according to the following rules:

Apply the primer in a circular motion towards the left or right side of the element.
The composition must be allowed to dry completely.
After that, sandpaper No. 800 is taken and everything is thoroughly rubbed over.
Using a regular water bottle, you need to wash the bumper.In this case, it does not matter where the crack or other damage has formed, the bumper must be washed out completely. As soon as one layer is completely dry, the plastic automatically takes on a matte shade. The top soil is then completely washed off.
Only then can the second layer of the primer be applied.

Once all the applied layers are dry, a thorough inspection of the part will need to be performed using a lamp. The layers should be perfectly even and make up one piece together.

If, after examining the part, it becomes clear that all coatings are applied as efficiently and evenly as possible, you can proceed to such a process as painting. The room must be prepared, all surfaces that need to be protected from the paint used are closed. The pigment is applied strictly in two to three layers. Drying should take 5 to 10 minutes between each layer.

After applying the required paint coating, the bumper is coated with two layers of varnish. Intermediate drying is also important here. At the end of the painting work, you need to check the quality of the applied compounds again; if smudges are found, light sanding and thoroughly polishing the surface are required.

In the process of restoring the integrity and appearance of the bumper, the upcoming work will depend on the type of damage found. This is an important point, since one option is used for scratches and chips, a completely different method is required to remove a dent.

If you need to carry out repairs with your own hands, or the insurance does not work, or there is no money and desire to contact the service center, you will need to carefully study the nature of the damage. If the driver realizes that the bumper is very badly damaged, you should not try to restore the part on your own, but it is better to purchase a new one. If relatively small chips or dents are found, the problem can be completely eliminated on your own, knowing how to act in this or that case. So, how can scratches, dents and cracks be repaired quickly and effectively?

Elimination of this problem can be carried out by using sandpaper. Material No. 50 is taken and grouting is carried out. In this case, it is necessary to carefully eliminate all irregularities, acting until the surface becomes completely correct in shape. In the course of this process, the damage may become slightly larger in size, but their depth will become much smaller. Do not be afraid of this, after thorough cleaning all the irregularities will be filled with putty.

If there is a desire and certain skills, then instead of putty, you can use a special liquid plastic, which fully corresponds to the type of material from which the plastic is made. After applying this composition, after it has completely dried, it will also be necessary to clean the surface and carefully sand it, sanding it to the most even surface.

To repair a minor dent that did not damage the paintwork, you simply need to heat the deformed part of the bumper. The concave part of the plastic must be heated with a previously prepared thermal or technical hair dryer until the material becomes soft enough. After that, the dent is manually straightened, at the same time giving the damaged section of the bumper the correct geometric shape.

If cracks appear on the surface of the bumper, it will be necessary to use a pre-prepared metal mesh and a soldering iron. The sequence of actions in this case will be as follows:

The edges of the damage must be brought together and soldered to one side of the mesh. It is advisable to drown it as deeply as possible in the plastic, but you cannot overdo it, as a hole may form.
The end of the mesh is covered with melted plastic.
Similarly, you need to walk along the entire crack.

If the damage to the bumper is minor, special construction brackets can be used instead of the mesh. In the process of soldering them, it is recommended to use tweezers, which will prevent burns to the brushes. Bonding actions should be spaced 2 cm apart and along the entire length of the crack.

To prevent the mesh and metal staples from rusting after a while, the items must be covered with special liquid plastic. At the end of all the work that is carried out on the inner surface of the bumper, its front side immediately takes on its original appearance.

The question of how to restore and repair a car bumper with your own hands is relevant for all, without exception, modern motorists. If you follow the instructions and tips provided in the article, you can repair damage to the bumper with minimal money and time.

Bumpers of modern cars are made mainly of plastic, they are damaged in a minor accident and collision is not an obstacle.

As you know, there are front and rear bumpers, and the front bumper (PB) is damaged much more often than the rear bumper (ZB). PB needs repair if:

the paintwork is damaged;
scratches appear on the plastic element;
bumper cracks have formed as a result of a collision with an obstacle or a minor accident.

If the impact to the front or rear of the car is severe, the bumper is most likely beyond repair. But in specialized car services, they often undertake the repair of a badly broken plastic bumper. The whole question is whether the restoration is worth the money, in some cases it is easier and cheaper to buy a new part.

The cost of repairing a PB or ST can be different, it depends on the level of the car service, the degree of damage to the part, the complexity of restoration. For example, in Moscow, the restoration of a bumper can cost from 2,500 rubles, and painting of one element will also cost from 5,000 rubles. There are auto repair shops that promise to repair the bumper from 500 rubles, to carry out repairs within one or two hours. Advertising is not worth it, most likely, car owners are deceived, or the repairs are performed here of poor quality.

Repair of a front or rear bumper can be of varying complexity, there are main types of work that are carried out with body elements:

sealing cracks;
restoration of plastic fragments;
repair of dents;
preparation for painting (stripping, sanding);
primer;
painting;
restoration, repair of fasteners.

Restoring a plastic bumper requires care and accuracy, sufficient experience, and only a qualified craftsman can do the job with high quality.

Repair of the PB becomes profitable if the bumper itself is rare, installed on an expensive car, on which the car owner does not want to install a cheap “non-original”. There are also tuning bumpers - they are expensive, and the industry does not produce non-original spare parts of this kind.

If the car is budgetary, and the owner of the car is "with hands", you can try to repair the PB yourself. Much depends on the degree of damage; you can also restore a slightly damaged body part with your own hands. Repair of the front bumper (with a crack) is carried out with the removal of the body part from the car, and to seal the crack, you need to connect the edges of the damaged area - make a reliable lock.

There are special repair kits on sale, for example, from 3M. The FPRM kit includes:

two components of epoxy material (glue);
reinforcing mesh;
special tape.

We prepare the bumper for gluing as follows:

the damaged area to be repaired is thoroughly washed with soapy water, we give time to the plastic to dry thoroughly;
we grind the repaired area, remove the paintwork from it. We clean the paint so that adhesive tape can be glued to the area freed from it;
we grind the edges of the crack at an angle of 45 degrees, they should be in the form of wedges. We process the surface first from the inside, and then from the outside, for this we use a grinder with a cleaning disc;
we clean the treated surface with the composition 3M 08985, wait for the complete evaporation of the degreaser;
we glue the scotch tape on the outside of the glued area;
from the inside, we fix the reinforcing mesh;
mix the epoxy components in a one-to-one ratio;
apply the prepared composition on the reinforcing mesh, with a spatula, push it inward, it must close the crack;
heat the crack with infrared drying (6-8 minutes). If there is no special drying device, let the glue dry at room temperature for about 30 minutes;
remove the tape, degrease, process the front part with an adhesion activator;
we prepare the composition for the front side;
apply glue on the outside of the crack;

let the parts dry again;
we process the dried surface with abrasive wheels, first with a coarser abrasive (180), then with fine "sandpaper" (240, at the end of processing - 400);
blow through the repaired area with compressed air, clean it with a compound from the set 3M 08985, wipe it with a dry cloth. The bumper is now ready for painting.

Damage to the bumper can be different - in one case it is just a crack, in the other, pieces of plastic fly off on impact. To seal a plastic element, you will need:

construction hair dryer;
angle grinder;
pliers;
screwdriver;
soldering iron;
sandpaper;
spatulas.

The soldering iron must be powerful enough, preferably at least 100 watts.

If the pieces of the bumper are broken off and lost, initially we modify the damaged areas, give them a rectangular or triangular shape.

We carry out the work in the following order:

from the inside and outside around the damage, we process the entire surface with a cleaning wheel - we clean off the paint;
we remove all cracks in the paint to the base (to plastic);
we prepare a nozzle for a hair dryer, it is needed so that hot air can be directed to the damaged area;
we join the torn seam, melt and solder the pieces with a soldering iron. We grab the plastic with a soldering iron in several places - it is also necessary for the plastic to become homogeneous;
we put on the nozzle on the hair dryer, with a hairdryer we evenly warm the plastic on both sides. It is important to keep an eye on the hair dryer, with a narrow nozzle it can overheat,
after warming up, align the edges of the plastic;
we solder the seam with a soldering iron thoroughly.

If you need to solder pieces of missing plastic to the bumper, it is advisable to take plastic of the same type, the marking is usually indicated on the inside of the plastic parts.

To solder the missing pieces into the bumper, proceed as follows:

we take paper, apply it to the bumper, draw a circle around the damaged contour;
we transfer the drawing from paper to plastic, cut out the necessary piece;
install the cut-out piece in the bumper flush, solder along the edges with a soldering iron;
So that the piece to be soldered does not move, we first grab it with a soldering iron from all sides.

If you cannot cut the desired piece to the exact size, you can cut off the plastic with a margin and solder it on the inside of the bumper. But this option is worse, since when soldering from the front part, a dimple is formed around the patch.