The car is constantly exposed to aggressive environmental influences, which inevitably affects its appearance. Even with the most careful operation paint-break It is only a matter of time and intensity of use of the vehicle. Sand flying from under the wheels in front of the cars, temperature changes, reagents on the roads and careless movements in the parking lot leave their marks on the body.
Timely identification of defects and understanding of their nature allow the owner to make the right decision about the method of recovery. Ignoring small scratches or chips can lead to corrosion of the metal, which will require not cosmetic, but complex body repairs with the replacement of elements. In this article, we will discuss the main types of damage, methods for their elimination and ways to protect your car.
Classification of damage to the paint layer
Before starting restoration work, it is necessary to accurately determine the nature of the defect. The vehicle’s LCP consists of several layers: phosphate coating, soil, base enamel and protective varnish. Damage can only affect the top layer or reach the metal.
The most common are mechanical damages resulting from physical contact with abrasive materials or sharp objects. There are also chemical effects that destroy the structure of the varnish or cause a change in the color of the pigment. It's important to distinguish varnish, which can often be polished, and deep chips to metal.
⚠️ Attention: If it does not “cling” to the nail on a scratch, then only the varnish is damaged. If the nail gets stuck, a layer of paint or soil is affected.
Special attention should be paid to thermal damage and burnout of paint under the influence of ultraviolet light. Extended sun exposure without protection can lead to mattiness and loss of color saturation, especially on red and black cars. Chemical burns from reagents or bird droppings are also complex cases requiring immediate intervention.
Mechanical damage: chipped and scratched
Mechanical damage accounts for the lion's share of all body defects. Scotch Most often formed on the hood, bumper and roof due to the impact of small stones and gravel. At the point of impact, the paint flies away in pieces, exposing the soil or metal. Such defects are dangerous because moisture quickly penetrates to the metal, triggering the process of corrosion.
Scratches They can be superficial (web) or deep. The web often occurs after poor-quality washing or using dirty sponges. Deep furrows appear when in contact with shrubs, nails or keys. Recovery of each type requires its own approach: from polishing to repainting the element.
Various methods are used to combat mechanical damage. Local painting allows you to paint a small area without affecting the entire element. However, for the ideal result, a complete repainting of the part with a rubbing of the edges is often required.
☑️ Diagnosis of mechanical damage
It is important to understand that modern multi-layer coatings (for example, metallic or mother-of-pearl) more difficult to repair than regular acrylic enamel. Incorrectly selected shade or violation of application technology will lead to the fact that the repaired area will be allocated.
Chemical and thermal effects
Chemistry on the roads is the scourge of modern motorists. Reagents used to fight ice contain aggressive salts, which, with prolonged contact, corrode the varnish and contribute to the appearance of rust. Bird droppings and tree sap also contain acids that can burn through the lacquer layer in a matter of hours, especially on a sun-heated body.
Thermal damage often occurs due to overheating of individual parts of the body or hot liquids. Although it happens less often, the consequences can be serious. The paint may swell, change color or crack. In such cases, a complete stripping of the element to the metal and the application of a new coating is necessary.
To protect against chemicals, it is recommended to wash your car regularly using specialized pH-neutral shampoos. Also effective are various polishes and waxes, creating an additional barrier between the aggressive environment and paint.
⚠️ Attention: Bird droppings should be removed as soon as possible. Use a wet wipe and a special cleaner, do not rub the dry surface so as not to damage the varnish.
If you notice a change in color or matte spots, this may indicate the beginning of a chemical reaction. In this case, professional polishing using abrasive pastes will help, which will remove the damaged micro-layer of lacquer.
Methods of restoration of paint coating
The choice of recovery method depends on the area and depth of the damage. For small defects that do not reach the metal, often enough polishing. Abrasive pastes remove the thinnest layer of varnish, leveling the surface and eliminating scratches. This process can be performed manually or with a polishing machine.
For more serious damage, such as chipped to metal, the technology is applied localization Or "point" repairs. The wizard cleans the damage, applies the soil, selects the color and carefully paints the defect, often using a microspray. This allows you to keep the factory coating on the rest of the part.
In cases where damage occupies more than 30-40% of the area of the element or are in a prominent place (the edges of the body), a complete repainting of the part is recommended. This ensures uniform color and no transitions.
| Type of damage | Repair method | Difficulty | Equipment required |
|---|---|---|---|
| Web (small scratches) | Polishing | Low. | Polishing machine, pasta |
| Deep scratch (to the ground) | Local paint. | Medium | Krascopult, soil, enamel, varnish |
| Flip to metal | Repair of chips / Painting | Medium/High | Chopper kit or paint chamber |
| Bloating paint (corrosion) | Full repainting | Tall. | Grinding machines, welding (possibly), painting equipment |
Can I paint the chip with a brush?
Yes, for small chips, you can use rempleks (pencil) with a brush. However, the result will be noticeable on close inspection, and the surface will not be perfectly smooth. This method is only good for corrosion prevention, not aesthetics.
Technology of local repair and painting
The process of professional recovery of LCP requires strict adherence to technology. The first step is always the surface. The part is washed, degreased, and the damaged area is cleaned. If there is corrosion, it is removed mechanically or chemically.
Next, the soil-filler is applied, which aligns the surface and provides paint adhesion. After drying the soil, fine grinding is performed. Then the application of the basic enamel follows. At this stage, accurate hitting of color is critical, for which colorists use spectrophotometers.
Sequence of application of layers:1. Degreaser
2. Ground acrylate (2-3 layers)
3. Basic enamel (2-3 layers with interlayer drying)
4. Lacquer (2 layers)
5. Polishing (after complete polymerization)
Completes the process of applying a lacquer layer that protects the paint and gives shine. After complete polymerization (usually 24 hours), the surface is polished to remove possible defects (dust, shavern).
When drying paint in garage conditions, use an IR lamp, but watch the temperature so as not to overheat the metal and plastic, which can lead to deformation.
Body protection: preventive measures
The best repair is its absence. The modern industry offers many ways to protect the LCP. One of the most effective is the car’s sleeve. antigravel (polyurethane) She takes on all the blows of rocks and sand, remaining transparent and invisible.
Ceramic coatings create a solid hydrophobic layer on the surface. They do not protect against shocks, but they perfectly resist chemistry, simplify the washing and give the body a rich shine. Liquid glass and wax compounds work on a similar principle, but require more frequent updating.
Regular care also plays an important role. The use of two-phase washing, soft chemistry and the right sponges minimizes the risk of a “web spider”. Do not neglect cleaning the body from bitumen spots and metal inclusions with special means.
⚠️ Attention: Do not use household chemicals (washing dishes, washing powders) to wash your car. They wash off the protective wax and can damage the structure of the varnish.
An integrated approach to protection, including a combination of film at vulnerable places (hood, bumper, sills) and ceramic coating on the rest of the body, allows you to keep the car in a state of “new” for many years.
The combination of anti-gravel film in risk areas and regular polishing is the optimal strategy for preserving the LCP.
Frequently Asked Questions (FAQ)
How much paint will dry after local repairs?
The drying time depends on the type of paint and the ambient temperature. When using drying in a chamber at 60°C, the process takes about 30-40 minutes. Under natural conditions at +20°C, primary drying occurs in 2-3 hours, but full polymerization and strength gain take from 7 to 14 days. During this period, it is better not to wash the car with chemicals and not to expose heavy loads.
Can a deep scratch be completely removed by polishing?
No, if the scratch is deep and the nail "clings" to its edges, polishing will not help. The polishing removes only a microscopic layer of lacquer. To remove a deep scratch, it will be necessary to fill it with a material (enamel) and subsequent alignment or repainting of the element.
What to do if there is a “bug” (blown paint)?
"Bug" is a sign of corrosion under the paint layer. Just paint it over it is useless - the rust will continue to spread. It is necessary to clean the damage to pure metal, treat with a rust converter, primed and then painted.
How often should the ceramic coating be updated?
The service life of ceramics depends on its composition and operating conditions. Budget compositions serve 1-2 years, professional multilayer coatings - up to 5 years or more. Updating the upper hydrophobic layer (topper) is recommended every 6-12 months to maintain the properties.