Small damage to the paintwork left by gravel on the road or sharp objects in the parking lot, require immediate intervention, as the exposed metal begins to oxidize under the influence of moisture and reagents after a few hours. To qualitatively remove chips on the car body with your own hands, you must first assess the depth of damage: if only the varnish is touched, polishing is enough, but if the base layer or primer is damaged, local paint with preliminary cleaning and degreasing of the surface will be required. Ignoring even microscopic points leads to the growth of foci corrosionThis will require expensive repairs in the future with metal digestion.
The recovery process begins with a thorough washing and drying of the damaged area, as any dust that falls under the paint will spoil the result of the work. For accurate selection of shade, use the color code indicated on the manufacturer's plate, or contact a specialized store for computer mixing of enamel. Modern. paint-paint They have a complex chemical composition, and the attempt to choose a shade “by eye” often leads to a noticeable difference in tones after drying.
Diagnosis of damage and choice of repair method
Before the beginning of active actions, it is necessary to clearly classify the nature of the defect, since the technology for eliminating deep chips and surface scratches is radically different. If you feel a sharp drop when carrying out the nail damage and see shiny metal, then the integrity of all layers of the coating is violated. In such cases, simple polishing It will not give a result, but only thin the lacquer layer around the defect, making it more noticeable.
For surface damage that has touched only the top layer of the varnish, often enough use of abrasive compounds or special pencils-correctors. However, if the chip has reached the metal or plastic, the algorithm of actions becomes more complicated: it requires the application of soil for adhesion, subsequent filling of the volume with paint and finishing with varnish. The mistake of many motorists is an attempt to paint the rust without pre-treatment with a neutralizer, which only preserves the process of metal destruction under a new layer.
How to accurately determine the depth of the chip
Use a magnifying glass or macro shot on your smartphone. If the bottom of the chip has a rusty or gray metallic tint, you need soil. If you see black or colored plastic (on bumpers) - the soil is mandatory. If the color of the bottom coincides with the color of the body, but there is a recess - only varnish is damaged.
It is also important to consider the body material, since repairing aluminum panels or plastic elements requires specific primers. Steel body elements are most susceptible to rapid development corrosionSo the reaction time is critical here. Plastic does not rust, but the paint on it is worse due to the elasticity of the material, so special adhesive primers are required.
Required tools and materials for the job
The quality of the result directly depends on the materials used, so you should not save on components for restoration. The basic set includes a degreasing agent (antisilicone), fine-grained sandpaper (P2000-P2500), polished paste and, of course, enamel itself in body color. For spot paint, professionals use thin brushes, needles or special restoration kits to control the amount of material.
- 🛠️ Degreaser - is necessary to remove silicones, waxes and oils that prevent paint adhesion.
- 🎨 Car enamel - the main pigment, selected strictly according to the color code of the car.
- 💧 Solvent - used for diluting paint and cleaning tools (646 or a special solvent for bases).
- 🧽 Polishing paste - abrasive composition for finishing the transitions and leveling the shine.
Particular attention should be paid to the choice varnishIf the recovery involves its application. Lacquer protects the base layer from burnout and mechanical effects, giving depth to the color. Some restoration kits already contain a two-component varnish, which must be mixed with a hardener immediately before use, observing the proportions indicated in the instructions.
Buy materials from one manufacturer. Chemical compositions of different brands can react, causing swelling or clouding of the coating.
Surface preparation and corrosion protection
The most important stage is the preparation, which depends on how long the car will maintain a neat appearance after repair. First, the damaged area is thoroughly washed, then mechanical cleaning of the edges of the chip is performed to remove the exfoliated particles of paint and rust. To do this, you can use a scalpel, toothpick or small sandpaper, carefully working only inside the defect.
⚠️ Note: Do not use aggressive orthophosphoric acid-based rust converters if you plan to paint immediately, as they can worsen adhesion. It is better to mechanically clean the rust to pure metal.
After cleaning, the surface is necessarily degreased. Wipe the area with a lilaless napkin moistened with antisilicone, movements from center to edges, so as not to smear pollution on a clean surface. If the chip is deep and metal is visible, it is recommended to apply the thinnest layer of acid or epoxy soil with a thin brush or needle. This will create a barrier to moisture and ensure a reliable grip of the paint with the metal.
Drying the soil is a critical moment. Even if the surface appears dry, the chemical processes can take longer. Follow the instructions for a specific ground: usually it is from 15 minutes to several hours. Hasty paint on undried soil will lead to the appearance of bubbles and craters in the future.
Paint and lacquer technology
The process of applying paint requires calmness and a firm hand. Enamel must be thoroughly mixed, but not shaken intensively, so as not to create air bubbles. Apply the material in stages: the first layer is very thin, almost "swimmer" to create a base for clutch. Do not try to close the chip with one greasy layer - this will lead to leakage and long drying.
☑️ Layering procedure
If the system "baza-lac" is used, then after drying the base enamel (it will become matte), varnish is applied. The lacquer is also placed in 2-3 thin layers with intermediate drying. The main task is to fill the chip volume so that the level of paint equals the level of the factory varnish, creating a small “lens”. In the process of drying, the material shrinks, so the layer should be with a small margin in height.
| Type of damage | Materials required | Drying time (min) | Application tool |
|---|---|---|---|
| Scratching to the ground | Degrease, paint in color, varnish | 15-20 | Thin brush |
| Deep chip to metal | Soil, paint, varnish, polymer | 40-60 | needle or hand |
| Damage to the polish | Polishing paste, polishing | 0 (right away) | A polishing machine |
| A chip on plastic | Primer for plastic, paint, varnish | 30-40 | Micro-hand |
When working with metallics or pearls, it is important to correctly place aluminum particles. To do this, the last layer of paint can be slightly "quenched" with a solvent to raise the silver level with the main coating. If this is not done, the repair point will be darker or lighter than the main background depending on the angle of view.
Finishing and polishing of the transition
After the paint and varnish have been fully polymerized (usually it takes 24 hours to several days depending on the temperature and type of materials), the finishing process is started. If a noticeable bump or transition has formed, it must be carefully sanded. For this purpose, water and sandpaper of the P2000-P2500 gradation are used. Grind it should be very carefully, constantly wetting the surface with water, so as not to wipe the varnish to paint.
The main purpose of polishing is to make the transition between the repaired area and the factory coating invisible to the eye and smooth to the touch.
After the surface is resurfaced, it will be matte. To return the shine, an abrasive polished paste is used. Apply a small amount of paste on a polishing circle or soft napkin (if you work by hand) and treat the area with circular movements. Then apply a paste with a smaller abrasive to remove holograms and finishing gloss.
The result of correct polishing should be a perfectly smooth surface on which the chipping place is not tactilely determined. Visually, the point may be barely noticeable only on very close examination, but from arm's length, the defect should not be visible.
Typical errors and precautions
In the process of self-repair, beginners often make mistakes that negate the result. One common problem is applying paint in a dusty room or in the wind. Dust, settling on fresh paint, create roughness, which is then extremely difficult to remove polishing without damaging the surrounding areas.
⚠️ Warning: Never work under direct sunlight or on a hot body. High temperature causes too rapid evaporation of the solvent, which leads to shaking, bubbles and poor adhesion.
Another mistake is to use too much paint at a time. The fatty layer dries unevenly: a film is formed from above, and the solvent remains liquid inside. Over time, it tries to escape, forming craters or causing detachment. It is better to make three thin layers with intermediate drying than one thick one.
It is also important to remember the toxicity of the materials. Work with automotive enamels, solvents and especially two-component varnishes with hardeners should be carried out in a well-ventilated room or on the street. The use of a respirator and gloves is a safety requirement, as the pairs of isocyanates contained in hardeners can cause serious allergic reactions and poisoning.
How to store the paint after repair?
The residues of the paint must be carefully closed to prevent the solvent from evaporating and drying out. The bottle neck should be cleaned of paint, tightly twist the lid and turn the bottle upside down for a few seconds, creating a vacuum plug. It is better to store in a dark cool place, for example, in the refrigerator (separate from products), which will significantly prolong the shelf life of the enamel.
Can I paint a chip with a regular enamel from a can?
Use of ordinary nitro-enamel or spray paint for body repair is not recommended. Such paints have a different chemical composition, are not resistant to gasoline, oil and ultraviolet light. They will quickly burn out, start peeling and can react with the factory coating, spoiling it. Use only specialized automotive materials.
What to do if the color is chosen incorrectly?
If you notice that the shade is different after drying, do not panic. Often the difference is caused by the car’s main covering burning out over time. In this case, it may be necessary to polish the entire element (hood, wing) to align the tone, or conduct a more complex procedure for selecting paint taking into account fading, which is better to entrust to professionals in the color studio.
Do I need a varnish for black plastic parts?
On many black plastic parts (mirrors, moldings) factory varnish is absent. If you damaged such a detail, you do not need to apply varnish - it is enough to choose the paint in the color of the plastic. The polish on such surfaces can eventually climb or change color, creating a visible stain.