Recovery of the paint coating of the car is a process that requires not only theoretical knowledge, but also the right tools. Car paint kit It is not just a random collection of cans, but a carefully selected system of materials that provide adhesion, color reproduction and durability of the coating. Errors in the selection stage of components can negate all efforts, turning the desired gloss into a matte surface with defects.
The market offers many solutions, from budget aerosol kits to professional blending systems in colors. Understanding the chemistry of processes and the physical properties of materials is critical for the master. Basic enamel, varnish and soil They must be chemically compatible with each other, otherwise there is a risk of detachment or change in hue over time.
The quality of the final result directly depends on the preparation of the surface and the conditions of application. Even the most expensive material will fall short if the technology is broken or the wrong solvent is used. In this article, we will discuss in detail what should be included in the ideal kit, how to work with components and what should be avoided.
Basic equipment: what should be in the set
Any quality painter It is based on three whales: soil, enamel and varnish. However, simply having these three elements is not enough. It is important to consider their scope, type of base and compatibility. For example, local repairs often require special transition solvents that prevent a sharp drop in boundaries (apple phenomenon).
The ground layer serves as the foundation. It provides adhesion of paint with metal or plastic, and also hides small grinding defects. epoxy It protects against corrosion, while acrylic It's better at filling the risks. The choice depends on the condition of the body and the type of metal.
Can the soils of different manufacturers be mixed?
Mixing products from different brands is a lottery. The chemical composition of hardeners and solvents may differ, leading to swelling or poor adhesion. Use products of the same line or run a compatibility test on the test plate.
The standard professional kit also includes hardeners and solvents. Their mixing ratio is strictly regulated by the manufacturer. Dosage violation even by 5-10% can change the drying time and the final hardness of the coating. Solvent It should be selected depending on the temperature in the paint chamber: fast for cold, slow for hot.
⚠️ Warning: Never use acetone or gasoline as a solvent for automotive enamels. This will lead to instantaneous paint curtailment and irreversible damage to the sprayer.
Types of paints and their features of application
Modern sets are divided by the type of binder. The most common acrylic enamel, alkyd paints and water-based systems. Acrylic two-component paints (2K) are considered the industry standard due to its high wear resistance and brightness of color. They require the addition of a hardener before use.
Alkyd paints (1K) are dried by oxidation in air and often do not require varnishing, as they have their own gloss. However, they are less resistant to mechanical damage and burnout. Water-soluble bases They are becoming more popular because of their environmental friendliness, but they require specific equipment for drying and applying.
- 🎨 Acrylic (2K): High hardness, require lacquer, excellent color reproduction.
- 🛢️ Alkyd (1K): Easy to apply, dry for a long time, less resistant to chemistry.
- 💧 Water base: Eco-friendly, a complex application technology, requires strict humidity control.
When choosing paint, it is important to pay attention to the shade code of your car. Metallica and pearl They require a mandatory coating with varnish, since they are matte in themselves and do not have protective properties. Basic enamel in such systems performs an exclusively decorative function.
Toolkit: spray guns and compressors
The quality of the spray torch determines 80% of the success of painting. Krascopult (pulverizer) must correspond to the viscosity of the material used. For application of base and varnish systems are most often used HVLP (High Volume Low Pressure) or LVLP (Low Volume Low Pressure).
HVLP pistols require a large volume of air, but provide a high material transfer ratio (less fog, more paint on the body). LVLPs are more air-efficient and are great for medium-power home compressors. The diameter of the duse (nozzle) is selected under the material: 1.3-1.4 mm for the base and varnish, 1.6-1.8 mm for the soil.
Do not forget about air preparation. Moisture separator A critical element of the system. Even microscopic drops of oil or water in the paint will lead to the appearance of craters (fish eyes), which cannot be removed by polishing without repainting the element.
The compressor must provide stable pressure at the exit of the gun during all operation. If the pressure will "jump", change the torch spray, which will lead to stripes and uneven color. The volume of the receiver is also important: the larger it is, the less the compressor will turn on, providing drier air.
Surface preparation and consumables
Before opening the cans with paint, it is necessary to prepare the surface. A car painting kit rarely includes abrasives, but without them work is impossible. You will need sandpaper of various grains: from P80–P120 to remove old paint to P1500–P2000 to polish transitions.
Degreasing is a stage that is often underestimated. Using a poor-quality degreaser or napkins with pile can spoil the whole result. Antisilicone removes fat spots, and a sticky wipe removes dust immediately before painting. Neglecting these will lead to defects of adg.ezia.
| Materials | Appointment | Grain/Type | Criticism |
|---|---|---|---|
| Sandpaper | Floating, grinding. | P180 - P2500 | Tall. |
| Degreaser | Removing silicones | fast-drying | Critical |
| Sticky napkin. | Dust removal | Sticky layer | Tall. |
| Paint scotch | okleika | Heat-resistant | Medium |
A cover film and a paint tape are used to protect the adjacent elements. It is important to use Scotch, which leaves no trace of glue after heating and does not melt under the drying lamp. Cheap Scotch can "swim" by letting paint under itself, which will require a complex restoration.
Application technology: step-by-step instructions
The painting process begins with a thorough mixing of the components. Paint, hardener and solvent must be mixed in the proportions indicated on the bank, and filtered through the funnel with the mesh. Filtration is mandatory, even if the paint seems clean - it can be clots.
The application of soil is carried out in 2-3 layers with interlayer drying (flash-off) for about 10-15 minutes. After drying, the soil is grinded under painting. The base enamel is applied in thin layers ("fog") to avoid undercurrents. Usually 2-3 layers of the base are required with drying between them.
☑️ Checklist before painting
Lacquering is the final stage. The varnish is applied in 2 layers: the first thin (binding), the second is more wet (main, creating gloss). It is important not to overdry the first layer, otherwise the second may lie down poorly or give matteness. After applying the varnish, it takes time for primary polymerization before drying.
⚠️ Warning: Do not attempt to expedite drying with a building hair dryer or fan heater immediately after application. The sharp heating of the surface will cause the solvent to boil inside the layer, which will lead to porosity and bubbles.
Security and working conditions
Car paints and solvents are toxic. Couples isocyanatesThe stains contained in hardeners can cause severe damage to the respiratory system and allergies. Work without high-quality supply and exhaust ventilation and a carbon filter-respirator is strictly prohibited.
Temperature also plays a role. The optimal temperature for painting is 20-22 ° C. At lower temperatures, the paint will dry longer and may lose fluidity, forming an “orange peel”. At high temperatures, the material will dry too quickly, without having time to spread into gloss.
Use an incandescent lamp or a special heater to preheat the part to 30-35 degrees before painting. This will improve the material’s spreading and reduce the risk of moisture condensation on the cold surface of the metal.
The painter’s clothes should be clean, without pile and dust. A special jumpsuit is not a whim, but a necessity. Regular home clothes are the source of millions of microparticles that settle on fresh paint. It is also worth removing all jewelry and watches so as not to damage the covering and not get dirty.
Typical errors and their elimination
One of the most common problems is the appearance of craters. They arise from the residues of silicone, oil or water. You can only remove them by re-painting and re-painting. Local coloring in this case will not help, as the defect will appear again.
The mattiness of the varnish (occurrence) often occurs due to high humidity of the air or too rapid evaporation of the solvent. If the humidity in the room is above 80%, you can not paint. Also, the cause may be insufficient amount of solvent in the mixture or too low surface temperature.
- 💧 Craters: It's fat or silicone. The treatment is a complete repainting.
- 🌫️ Matness: The reason is humidity or cold. Treatment - polishing or repainting.
- 🍊 Orange peel: The reason is viscous paint or bad spray. The treatment is grinding and polishing.
Subductions are the result of applying too thick a layer or insufficient drying between layers. Small subductions can be tried to grind after complete polymerization (after a few days) and polished. Large subtracts require cutting and local paint.
The main cause of 90% of paint defects is not the quality of the paint, but a violation of surface preparation technology and temperature regime.
Frequently Asked Questions (FAQ)
How much does the paint dry completely?
The drying time per stick is 30-60 minutes, but full polymerization (hardness set) takes from 7 to 14 days. During this period, it is not recommended to wash the car with chemicals or polish the coating.
Can I paint my car in the winter in an unheated garage?
It's not recommended. Low temperature disrupts the chemical curing reaction, the paint may not dry at all or be covered with matte. The minimum temperature is +15°C.
Do I need to wash the soil before applying paint?
No, you can't wash the soil. It must be wrapped (made matte) with abrasive P800-P1000, degrease and immediately apply the base. If the soil stood for a long time, it must be washed with water and dried.
How do you dilute thickened paint?
Only the original solvent of the same brand should be used. Adding more solvent than recommended by the instructions will reduce the cover and strength of the coating.
How do you store paint residues?
Remains should be poured into small containers (to have less air), tightly closed and stored in a dark cool place. The shelf life of the finished mixture with a hardener is no more than 2-4 hours, after which it becomes unusable.