Cracks in car paint? What to do about cracks in car paint?

Hello, cracks in the car paint generally appear on the repaired car paint, there are many reasons for the problem, in order to get your car to the repair shop as soon as possible to repair, I hope it will help you.

Hello! This is a painting construction quality problem. If necessary, find a skilled technician to do a full car painting.

1.When the intermediate coating is added or wet-on-wet spraying is used, obvious cracks appear on the large plane, because the coating and thinner used between the coatings are not matched, and the bottom is weak and the surface is strong.

2.Apply the top layer if the bottom layer does not dry.

3.The surface layer is too thick, and the cold resistance and weather resistance are poor.

This means that this part of your car has been injured, putty, and painted, so after a long time, the putty will collapse. Pay attention to the north of Handan.

1.Cracking If you don't do some necessary care for the paint surface of the car, the metallic paint may produce a very subtle crack, which will continue to penetrate the paint until it "penetrates" the entire color paint layer, which is called "cracking" and looks very unsightly. This generally happens on metallic paints.

2.Paint fading Smoke and pollutants in the atmosphere are the main causes of fading and discoloration of car paint. Fading is different from oxidation, and when fading occurs, the paint will appear unevenly colored.

3.Paint oxidation Under the irradiation of the sun's ultraviolet rays, the paint film continuously evaporates oil into the air to protect itself. Over time, the oil content of the paint surface will be too dispersed.

The brightness and depth of the paint surface are greatly reduced, so that the paint surface slowly whitens, forming an oxide layer, and shortening the life of the paint.

One is to wipe carefully with a wet towel, some small marks may be wiped off, but this situation is often aimed at very small scars, and the actual use of the situation is relatively small, the second is waxing, the owner can choose to remove the slight scratches of the car wax to deal with, its effect will be more obvious.

If it is more obvious, only thoroughly depaint, grind to the metal surface, and then repaint.

1. Method: grinder.

Grind off, re-plaster, spray paint.

2. Symptoms: If you don't usually do some necessary care for the paint surface, metallic paint.

A very fine crack can occur, which will continue to penetrate the paint until it "breaks through" the entire layer of paint, a phenomenon called "cracking", which usually occurs on metallic paint. The crack is difficult to detect with the naked eye at the beginning, but it is more serious when it is visible to the naked eye.

3. Prevention: Frequent waxing can reduce cracks.

The air bubbles in the coating film expand due to climatic reasons or the internal stress in the coating film increases, causing the coating film to fail.

The paint is not mixed evenly, the thinner is insufficient or the model is not right.

The surface treatment of the substrate is not good, the sandpaper is too coarse, the cleaning is not clean or the gap is not filled properly.

There is oil or water in the compressed air pipes.

The coating film is too thick, and the leveling time between the coating films is not enough.

When painting, the temperature of the substrate is too high or too low.

Thermoset coatings are sprayed on undercured or thermoplastic acrylic films.

Precautions for cracking in automotive paint.

The paint must be mixed evenly, and the thinner should be used according to the specified ratio and model.

Strictly treat the surface of the substrate, paying special attention to the treatment around the feathered edge.

Proper maintenance of compressed air equipment.

With the correct spraying method, the coating film of each coating should be thin and wet to ensure the leveling time between the coating films. When spraying, the temperature of the surface of the substrate should be appropriate.

Spray a layer of epoxy paint to seal the thermoplastic acrylic coating.

If the crack is minor and only affects the topcoat, sandpaper can be used to sand the crack until the full surface is exposed, and then re-sprayed. If a crack penetrates the varnish, the defective area should be completely removed, the substrate defect should be completely repaired, and then re-painted.

Cracks in the paint surface of the new car can be repaired by a 4S shop, and the temperature is high in summer, so do not park outdoors to avoid paint loss after exposure.

1. Before, during and after the use of the vehicle, the dust on the vehicle body should be removed in time to minimize the adsorption of dust by static electricity on the body.

2. Rinse in time after rain. After the rain, the rain stains on the car will gradually shrink, so that the concentration of rainwater acidic substances will gradually increase, and if the rain stains are not rinsed with clean water as soon as possible, the topcoat will be damaged over time.

3. When washing the car, it should be carried out after the engine is cooled, and do not wash the vehicle in the scorching sun or high temperature, so as not to leave traces after the detergent is dried. Usually use special detergent and neutral living water to wash the vehicle by yourself, and should not use alkaline laundry detergent, soapy water and washing spirit to prevent washing off the grease in the paint surface and accelerating the aging of the paint surface.

4. Use a clean and soft rag or sponge to scrub the vehicle to prevent metal chips and sand particles from being mixed, and do not use a dry cloth, dry towel or dry sponge to wipe the car so as not to leave scratches. When wiping, you should gently wipe from top to bottom in the direction of the water flow, and should not draw circles and wipe horizontally.

5. For some special traces of strong corrosiveness, they should be removed in time. In this regard, it must be cleaned with a special detergent, and it should not be scraped with a blade or eliminated with gasoline at will, so as not to damage the paint surface. Generally, small abrasions, such as scratches on the surface of the paint, whitening of the scars or even if the surface of the paint is scraped into a hair-like shape, there is no need to touch up the paint.

Light, you can handle it with car wax. Heavy ones, do a polish will do.

If there is cracking of the body paint, the best way is to paint again, and during the warranty period, you can directly go to the 4S store to claim repainting. If you are out of insurance, you will need to pay out of pocket.

Automotive paint crack treatment can be used to polish the paint film in the cracked area until a complete, smooth surface is exposed, and then repainted, or it can be treated by grinding and polishing, and then removing the paint oxide layer to make the vehicle look radiant again. Under the irradiation of the sun's ultraviolet rays, the paint film continuously evaporates the oil into the air to protect itself, and the oil content of the paint surface will be too dispersed and lost for a long time, so it is easy to crack the paint.

Cracks in automotive paint are treated by sand the cracked area until a complete, smooth surface is exposed, and then repainted. The reasons for the cracking of automobile paint are: 1. The corrosiveness of bird feces and tree grease is caused by the car paint; 2. After spraying the filler, it is not completely dry, which is caused by painting the car; 3. Caused during transportation.

The maintenance methods of automobile paint are: 1. Before, during and after the use of the vehicle, the dust on the car body should be removed in time to reduce the adsorption of dust by static electricity on the body; 2. Rinse in time after rain. 3. When washing the car, wait for the engine to cool down, do not wash the vehicle in the scorching sun or high temperature to avoid the detergent being dried and leaving traces; 4. Use a clean, soft rag or sponge to wipe the vehicle from top to bottom in the direction of the water flow.

(1) Cracking. Solution: Sand the crack area until a full, smooth surface is exposed, then repaint. Regular waxing and regular maintenance can also alleviate or even avoid this condition.

b) Paint fading. Solution: If the degree of matte and fading of the car paint is relatively light, you can wax the car once.

If the paint loss and fading of the car surface is more serious, then it is necessary to respray the car to improve the overall aesthetics and enhance the protection ability of the car.

3) Paint oxidation. Solution: Paint oxidation can be treated by grinding and polishing.

After grinding and polishing, the oxide layer of the paint surface can be removed, so that the car can be rejuvenated and the color can temporarily return to the state of the new car. At the same time, glazing and coating can also be carried out. The sealing glaze can increase the sealing degree of the car paint, and it is resistant to high temperatures and UV rays.

The coating is to apply the protective film of the car paint to the surface of the body to isolate and protect the car paint.

Scratch treatment on car paint:

1.Oxidation of the paint surface.

Under the irradiation of the sun's ultraviolet rays, the paint film continuously evaporates oil into the air to protect itself. Over time, the oil content of the paint surface will be too dispersed. The brightness and depth of the paint surface are greatly reduced, so that the paint surface slowly whitens, forming an oxide layer, and shortening the life of the paint.

The naked eye can observe the black, whitish and dull phenomenon of car paint. Severe oxidation can be treated by grinding and polishing.

2.Traffic film.

The car generates a strong electrostatic layer due to friction during driving. Static electricity has a strong ability to adsorb dust, oil and chemical dust, and forms a hard traffic film for a long time. It is very easy to cause oxidation and corrosion of the paint surface, and it can be treated with grinding and polishing.

3.Chap. If you don't take some necessary care of the paint surface, the metallic paint may produce a very fine crack, which will continue to penetrate the paint until it "breaks through" the entire color paint layer, a phenomenon called "cracking". Sometimes, cracks can occur due to the quality of the repaint. If there is wax in the cracks, you will find that the body has a stripe (trailing lines) cracks.

Frequent waxing can gradually reduce the occurrence of cracks.

4.Fade. Poor paint quality is the main cause of fading, but it can also be caused by the deterioration of the varnish layer due to light pollutants. Fading is different from oxidation, and when fading occurs, the paint will appear unevenly colored. Medium and mild fading can be treated by grinding and polishing, and in severe cases, it must be repainted.

5.Etchs. Erosion marks are faceted abrasion. Insects, bird droppings, tree sap, tar, and asphalt can all cause erosion. Corrosion can only be treated by painting, and only a very slight can be solved by grinding and polishing.

6.Shallow scratches.

Due to friction and improper daily care during use, the car paint surface has slight scratches over time, and the primer is not exposed, which is very obvious in the sun. Generally, it can be removed by professional polishing methods.

7.Water marks.

The water marks are ring-shaped. It is the trace left after the evaporation of water droplets, and oxidized cars and cars that are often cleaned by detergents are more likely to be infected with water stains. When the water mark is slight, waxing and polishing can be **; In severe cases, it needs to be ground or painted.

The solutions to cracks in car paint are as follows:

1. Polishing the paint film in the cracked area until the complete and smooth surface is exposed, and re-painting;

2. If the crack degree of the car paint is light, waxing is sufficient. If the degree of crack in the paint surface of the car is serious, respray the paint on the car to improve the overall aesthetics and enhance the protection ability of the car;

3. Cracks in automobile paint can be treated by grinding and polishing, and after grinding and polishing, the vehicle can be temporarily restored to color.

Summary. If there will be cracks in more than two years, this situation may be its own, and the paint is not good. It is possible that he is the same vehicle, and this paint surface will also appear after a long period of exposure to the sun, or it may be this crack on the part of the painting itself.

It will also lead to this phenomenon, there is no good way to deal with it, you can go to the beauty shop to polish it, if it still doesn't work, then you need to spray the whole surface to deal with it.

What causes cracks in car paint? It is mentioned that the new car is more than two years old, why does it crack?

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

If there will be cracks in more than two years, this situation may be its own, and the paint is not good. It is possible that he is this vehicle, and this paint surface will also be stuffy after being exposed to the sun for a long time, and it is also possible that this crack appears on the part of this Ant Jane liquid body. It will also lead to this phenomenon, there is no good way to deal with it, you can go to the beauty shop to polish it, if it still doesn't work, then you need to spray the whole surface to deal with it.

Cracks, obvious cracks, are called cracks after the car is painted. Causes of automobile painting: when the intermediate coating is increased or the wet-on-wet spraying is used, obvious cracks appear on the plane, because the coatings and thinners used between the coatings are not matched, resulting in the inability to play an auxiliary role, so that the resistance of the paint film is weakened, so that fine cracks occur; Apply the top layer if the bottom layer does not dry. The surface layer is applied too thickly, so that the tension of the paint film exceeds the normal paint film, causing fine cracks.

The influence of old paint or previous repairs, existing damages, old paint or repairs, for the newly sprayed paint layer, has a comprehensive resistance weakening effect, thus affecting the performance of the paint film.

Automobile painting prevention and control methods:

1. Choose a coating with good matching properties, so that the hardness and elastic performance of the bottom layer and the surface coating film are similar.

2. After the bottom layer is dry, apply the top layer.

3. The thickness of the surface coating film should not be too thick, and it should meet the process requirements; It is necessary to choose a surface coating with good cold resistance and weather resistance, and to avoid premature exposure of the coated object to severe cold.

This is the body-in-white is not done well when it is galvanized, and the iron sheet under your paint may have rusted, I suggest you go to the 4S store to take a look at it, and let them give an explanation, such as satisfaction.

If the car is stained with corrosive substances, such as bird droppings and tree sap, if it is not removed for a long time, it will cause the car paint to crack after high temperature exposure in summer.

Car paint maintenance: 1. Do not brush the vehicle under the sun, so as to avoid cracks caused by cold and hot changes in the car paint.

2. Check the surface of the paint regularly. If cracks or bumps are found, they should be dealt with in time to avoid greater damage to the surface of the car paint due to wind and sun in the future. If it is a small scratch or bump, the general treatment method is to polish the surface with water sandpaper, and then apply it with a professional paint pen, or apply the auxiliary paint given by the original car.

If you don't have any, you can use a white toothpaste to apply evenly, especially with white paint.

3. Do not use the car clothing to avoid heat. The use of the car clothing will cause friction between the surface of the car paint and the inside of the car clothing, especially in the light wind, which will inadvertently wear down the surface of the car paint.

4. Don't redo the paint easily. Some car owners see that there is a small scratch on this part of the vehicle, and there is another one over there. I simply redid all the paint on one side.

Actually, this is not good. First of all, it is not worth it to spend economically, but to re-paint is on the basis of the original, re-polishing the car paint, re-spraying, and re-sealing the glaze, which is more time-consuming and labor-intensive, and there is also the re-made car paint is not as natural as the original car paint, and the gloss is not good.

5. Don't use car marbles after rain. In order not to scratch the surface of the car paint, try to wash it with chicken skin, etc., or go to the car wash room for treatment.