The metal base of the body, bare as a result of a gravel impact or contact with branches, begins to oxidize literally in the first hours after damage. So How to paint a chip on a car qualitatively and stop the development of corrosion, it is necessary to immediately clean the damaged area of dirt, degrease it and apply anti-corrosion soil if rust has already come. Ignoring even a microscopic scratch to the metal leads to the swelling of the paintwork around the defect in a few months, which will require a full-fledged body repair with stripping to bare metal.
Modern technologies allow you to perform local restoration of the coating without visiting the service, using special remixes. Well-chosen paint-code and compliance with the temperature regime of drying allow you to make the repair site almost invisible to the prying eye. It is important to understand that the application technology depends on the depth of damage: if only the varnish is affected, polishing is enough, but if the base layer or soil is damaged, a multi-step recovery is required.
Diagnosis of the depth of damage and choice of materials
Before starting work, it is necessary to determine exactly which layers of coating were damaged. Surface scratches that only touch the top layer varnishThey are often masked with polished pastes without the need for painting. If the nail clings to the edges of the defect and the soil or metal is visible, the use of a restoration pencil or brush with selected enamel is required.
A critical step is to find the original paint code, which is usually indicated on a sign in the doorway or under the hood. Manufacturers use complex coding systems, where even the same color names, for example, are used. White Pearl or Black MagicThey can have different colors depending on the year of model release. Using the wrong enamel will cause the painted area to stand out as a stain, especially in the sun.
⚠️ Warning: Never use universal dyes "for any color" to seal chips in prominent places of the body. Such compositions tend to change the shade under the influence of ultraviolet faster than the original coating, and after six months your “patch” will become bright yellow or faded.
To work, you will need not only the paint itself, but also a number of auxiliary materials that ensure adhesion and durability of repair. Professionals are often already in the corrosion-predatorThis prevents rust from appearing under a new layer of enamel. Without this intermediate layer, moisture will penetrate the paint, causing it to detach.
For accurate color selection in specialized stores use a spectrophotometer, which reads the shade from the hatch of the gas tank or the inside of the door, taking into account the degree of burnout of the main coating.
Preparation of the work area and tools
The quality of the final result depends on how carefully the surface preparation was carried out. Work should be carried out in a dry, well-lit room, where there is no dust and drafts, as any mottled ground that gets on fresh paint will spoil the appearance. The ambient temperature should be in the range of +15 to +25 degrees Celsius, which ensures the correct polymerization of materials.
Fine-grained sandpaper or special abrasive pencils are used to remove oxides and burrs at the edges of the chip. The movements must be careful not to damage the whole paintwork around the defect. After mechanical cleaning, the surface is necessarily degreased with a special composition, for example, antisilicone Or isopropyl alcohol.
- 🛠️ Tools: a magnifying magnifier, tweezers, a set of microchips or toothpicks for spot application.
- 🧴 Chemistry: degreaser, polish paste, primer, base enamel, varnish.
- 🧼 Expenditure: Lilaless napkins, paint scotch, polishing circles.
If the chip has ragged edges or a “pocket” with rust has formed inside it, it is necessary to carefully clean the corrosion to pure metal. To do this, you can use a rust converter, which chemically neutralizes the oxides and creates a protective film. However, after its application, the surface also requires careful degreasing before applying the soil.
☑️ Preparation for painting
Technology of applying soil and paint
The process of recoating begins with the application of soil if the damage is deep and reaches the metal. Soil fills micronerves and creates an adhesive basis for enamel. Apply it should be the thinnest layer, using a thin brush or needle, trying not to go beyond the chip. Excess soil must be removed immediately so as not to create excess height.
After drying the primer (usually 15-30 minutes), the turn of the base enamel comes. The paint must be shaken carefully before use to lift metal dust (if it is “metallic”) or to level the consistency. Application is made by the method of "tamponing": light touches of the brush or toothpick paint fills the indentation of the chip.
| Phase | Materials | Time to dry | Tool. |
|---|---|---|---|
| Grounding | Acid or epoxy soil | 20-30 minutes | Thin brush |
| Basic enamel | Paint to the body | 15-20 minutes | Toothpick/needle |
| Lacquer | Two-component lacquer | 24 hours. | Micro-paint |
| Polishing | Abrasive paste | - | Feeter Circle |
It is important to apply the paint in several micro-layers, allowing each of them to dry. If you try to pour the chip with one thick layer, flows are formed, and after drying, the surface can wrinkle. For colors such as "metallic" or "pearl" the application technique requires special care to properly stack metal particles.
The Secret of the Perfect Metallic
To make the metal particles fall properly, the last micro-layer of enamel can be applied slightly more liquidly (by adding a little solvent), allowing the particles to navigate parallel to the surface, creating a uniform shine.
Finishing and polishing of the transition
After the base enamel is completely dry, which can take from several hours to a day depending on the type of paint, a protective varnish is applied. Lacquer gives depth to the color and protects the enamel from the influence of the external environment. Like paint, the varnish is applied carefully, trying to form a dome above the chip, which will then be compared with the overall level of coating.
When all the layers are completely polymerized (it is recommended to wait at least 24 hours, and preferably several days), begin to level the surface. If a small bump is formed, it is carefully sanded with water using sandpaper with graininess. P2000 or P2500. Work must be extremely delicate, constantly wetting the surface with water.
- 💧 Wet grinding: It removes the step of transition between the old and new paint.
- ✨ Abrasive polishing: Remove the stain after the stain and return the gloss.
- 🛡️ Protective polishing: It creates a hydrophobic layer and enhances the shine.
The final stage is polishing the restored area and the area around it with a polishing machine with a soft circle and finishing paste. This action removes the micro scratches left by sandpaper and makes the transition between the repaired area and the factory coating visually imperceptible. The result is a smooth, shiny surface protected from corrosion.
The secret of success is patience. Do not try to speed up drying with a hair dryer or apply all the layers at once. Each micro-layer must dry, otherwise the coating will become cloudy or wrinkled.
Common mistakes in self-repair
One of the most common mistakes is to apply paint on a poorly defatted surface. Fat film, even invisible to the eye, drastically reduces adhesion, and after a short time the paint will begin to peel off along with the varnish. Also, beginners often ignore the need to protect the adjacent area, staining neighboring areas with solvent or paint.
Another problem is the wrong selection of layer thicknesses. Too thick layer of enamel dries for a long time, can bubble and give a strong shrinkage, forming a depression. Too thin a layer will not cover the color of the soil or metal, and the defect will shine through. It is important to find a balance and apply the material in stages.
⚠️ Note: Do not work in the open sun or in high humidity. Direct sunlight heats the metal, which causes the solvent in the paint to boil, forming craters (“orange peel”), and high humidity causes varnish clouding (the “bleach” effect).
Using inappropriate solvents can also lead to dire consequences. Aggressive chemistry can dissolve not only fresh paint, but also damage the factory coating around the chip, making the defect even more noticeable. Always use solvents recommended by the repair enamel manufacturer.
Frequently Asked Questions (FAQ)
Can I paint the chip with a regular spray paint?
Use ordinary nitro-enamel from a can of canister is not recommended, since it will not stay on the body and quickly peel off. In addition, it is extremely difficult to choose the exact shade and apply the paint locally without capturing large areas. It is better to use special restoration kits.
How long does it take to dry the paint before polishing?
For full polymerization and the possibility of safe polishing, it is advisable to wait at least 24-48 hours. Some two-part varnishes dry longer. If you start polishing too early, you can “pluck” the soft paint and spoil the result.
Do I need to remove the rust if it has already appeared in the chip?
Yes, I will. Painting rust without removing it only preserves the corrosion process under the paint layer. Rust must be cleaned mechanically or treated with a converter, then primed.
How to remove color transition after painting?
The color transition (if the shade is selected correctly) is removed by polishing with abrasive pastes. If the shade is chosen incorrectly, polishing will not help - you will need to redo the work with a new paint. In complex cases (three-layer pearl) transitions may remain noticeable.