Small points on the hood or the edges of doors, where soil or metal is visible, are a direct route to the development of corrosion, if urgent measures are not taken to seal them. Removal of chips on the body It requires not just painting, but proper surface preparation, otherwise the rust will rise from under a new layer of paint in a couple of months. Modern methods allow you to restore the geometry of the paint coating almost to the factory state, using both local painting and full-fledged polishing with transition.
Ignoring even microscopic damage to the enamel on the steel elements of the car leads to the oxidation of the metal, especially in winter when in contact with reagents. Galvanic corrosion It corrodes the body from the inside, increasing the area of damage exponentially. That is why timely treatment of corrosion foci and restoration of the protective layer of paint become critical procedures for maintaining the market value of the vehicle.
The restoration process varies depending on the depth of the damage: if only the varnish is affected, polishing is enough, but if the base and soil are damaged, a more complex technology is required using the application of the varnish. pencils Or airbrushers. Car owners often underestimate the importance of selecting the exact shade, which eventually leads to noticeable spots on the body. The correct approach involves degreasing, priming, applying base and varnish followed by polishing the transitions.
Diagnosis of the depth of damage to the paint coating
The first step before starting any work is a thorough inspection and determination of the depth of penetration of the chip. Surface scratches that only touch the top layer of the varnish are often eliminated by abrasive polishing without the need for new materials. If, on visual inspection, a colored layer of paint (base) or gray / white soil is visible, use is required. restorative. When shiny metal is visible at the bottom of the chip, urgent anti-corrosion treatment is necessary.
For accurate diagnosis, professionals use a backlit magnifier or special thickness meters, although for chipping, careful visual control is often enough. It is important to determine whether there is a bloating of paint around the chip, which indicates the beginning of the corrosion process under the layer of the LCP. In such cases, a simple paint-up will not help - you will need a stripping to the metal and application. rust-converter.
Particular attention should be paid to the edges of the doors, hood and trunk lid, where the paint layer is the thinnest and is subject to gravel impacts. It is here that most often through damage to the metal is formed. If you miss this stage of diagnosis and do not assess the real area of damage, you can spend time on useless polishing where you need it. localization.
⚠️ Warning: Never try to polish the chip to metal with abrasive paste - this will only widen the area of damage and accelerate corrosion.
Required tools and materials for restoration
The quality of the final result depends on the materials and tools used. For the professional chipping will require not only paint, but also a set of auxiliary means that ensure adhesion and durability of the coating. The basic set includes a degreasing agent, polished clay, abrasive pastes of different grains and polishing circles.
The key is the selection of paint. The factory color code, indicated on a sign in the doorway or under the hood, helps to find the exact shade, but over time, the factory paint fades. Therefore, before applying to the visible parts of the body, computer selection is often required taking into account the current state of the vehicle's LCP. For small jobs, they are used retouchingincluding a brush or applicator.
Equally important are the tools for surface preparation. Microscopic chips often require the use of the finest needles or special syringes for spot application of soil and paint. The use of cotton swabs is permissible only for very large damages, but for high-quality work it is better to purchase a professional one. toolkit.
Use a UV lamp to check the quality of surface cleaning – it helps to identify the remains of bitumen and silicone, invisible to the eye.
Technology of removing chips with their own hands
The recovery process begins with thorough washing and degreasing of the working area. Use of the isopropyl or a special degreasing agent allows you to remove wax, bitumen and dirt, providing perfect adhesion of materials. After drying the surface, mechanical cleaning of the chip from oxides is carried out, if they have already appeared.
Then there's the application of soil. If the chip is deep and reaches the metal, primer is mandatory - it creates a protective layer and improves the grip of the paint with the body. The soil is applied with a microscopic brush or needle strictly within the limits of damage. After drying the soil (usually 15-30 minutes), the surface is carefully polished in the level with the main varnish, without touching healthy areas.
The next step is to apply a color base. The paint is applied layer by layer, allowing each micro-layer to dry. The main task is to fill the volume of the chip, creating a small bulge ("hump"), since the paint shrinks when drying. After the base is completely dryed (it is better to leave for a day), varnish is applied, which also forms a volume.
☑️ Preparation for painting
The final stage is the polishing of the transition. After the varnish is completely hardened (from 24 hours to several days depending on the chemistry), the protruding "humpbic" is gently sanded with an abrasive P2000-P2500, and then polished with pastes. The result should be a perfectly smooth surface on which the chip is not felt with a finger.
Professional methods: Spot Repair and airography
Technology is often used in specialized centers. Spot Repair (point repair), which allows you to restore the LCP without painting the entire detail. Masters use special transition solvents that allow you to dry the new paint on the old coating so that the border becomes invisible. This method requires high qualification and expensive equipment.
Another professional method is the use of an airbrush with a microscopic torch. This allows you to apply the paint in layers of a thickness of several microns, perfectly repeating the structure of the factory "shagrain" skin (orange peel). Aerography It gives the best visual result, completely hiding the traces of repairs even in dark colors.
There is also a vacuum extraction method for chipped dents, but it is only applicable if the metal is not stretched. In such cases, the geometry of the metal is first drawn and then a standard LCP recovery procedure is performed. A professional approach ensures that the paint thickness of the factory is maintained on the rest of the part.
⚠️ Attention: Attempting to polish fresh varnish immediately after application will lead to clouding and the appearance of holograms - observe the drying time.
Comparison of recovery methods: table
The choice of method depends on the budget, the desired quality and skills of the performer. Below is a comparison of the main approaches to solving the problem.
| Method | Cost | Durability | Visual effect |
|---|---|---|---|
| Retouching pencil | Low. | 6-12 months | You see, bumpy. |
| Local painting (with your own hands) | Medium | 2-3 years | Hardly noticeable on close inspection |
| Spot Repair (service) | Tall. | 5 years | Unnoticed. |
| Full paint of detail | Very high. | 5 years | Like new, but risk of losing factory paint |
As you can see from the table, for a daily car, the optimal balance is a quality local painting or professional Spot Repair. Using cheap pencils is a temporary solution that only stops rust, but does not restore aesthetics.
The main criterion for success is not the speed of drying, but the careful preparation of the edges of the chip before applying materials.
Protection of the body after repair and preventive measures
After a successful chipping It is important to fix the result and protect the body from new damage. A modern and effective solution is to apply a ceramic coating or liquid glass. These compounds create a hard layer that takes the blows of small stones on itself, preserving the integrity of the paint.
Also popular is the pasting of the most vulnerable places (hood, bumper, mirrors) with a transparent anti-gravel film (polyurethane). The film is 150-200 microns thick and completely absorbs the energy of the impact of the gravel. This is an expensive but most reliable investment in the safety of the LCP, especially for soft-varnished cars.
Regular care, including two-phase washing and the use of wax sprays, helps maintain the hydrophobic properties of the surface. A clean car is less susceptible to corrosion, since moisture and aggressive reagents linger longer on a dirty surface. Quartz coating It also facilitates the washing process, reducing the risk of new scratches from the brush.
The myth of "folk methods"
There is an opinion that chips can be covered with nail polish or wax. That's a gross mistake. Nail polish has no adhesion to car paint and will pee in a week, and under it will begin active corrosion. Use only specialized automotive chemicals.
Frequently Asked Questions (FAQ)
Can I paint a chip with a regular enamel from a can?
It is not recommended to use ordinary enamel, as it may not coincide in color and structure, and will not have the necessary elasticity. It is better to use remixes designed specifically for motor-driven.
How much paint will dry after local repairs?
The drying time depends on the temperature and the type of paint. The base layer dries for 15-30 minutes, varnish for several hours. Full polymerization and washing capability occur in 24-48 hours.
Do I need to be covered if metal is visible?
Yes, a primer is mandatory. It prevents the oxidation of the metal and provides adhesion of the paint to the body. Without soil, the paint will peel off quickly.
Will polishing remove the deep chip?
No, polishing only removes superficial scratches on the varnish. Deep chip requires filling the volume with paint or special compositions.
How to find a paint code for repair?
The paint code (Color Code) is usually on the nameplate in the opening of the driver's door, under the hood or in the trunk. It consists of letters and numbers, for example. GM 94U or TOYOTA 3T3.