The decision to update the paint coating of your car yourself is a bold step that requires not only financial investments, but also a huge margin of patience. Many car owners for years postpone this process, fearing not to cope with the technology or spoil the appearance of the car, but with the right approach, even in a conventional garage, you can achieve a result close to the factory. Painting a car with your own hands in the garage for the first time step-by-step instruction with spray gun video - this complex approach will allow you to avoid typical mistakes of beginners and understand the physicochemical processes that occur when applying enamel.
Before purchasing materials, you need to honestly assess the condition of your premises and the available tools. The garage should not just be dry, but practically sterile, since any speck of dust caught on fresh paint will spoil the entire look and require time-consuming polishing or even repainting of the element. Technological process It is divided into several critical stages: surface preparation, primer, application of base and varnish, as well as finishing.
You should not expect that the first experience will go perfectly smoothly, but knowledge of the theory significantly increases the chances of success. In this article, we will discuss every aspect of working with spray-rotCompressor pressure settings and the secrets of making paints that are usually known only to professional painters.
Workspace organization and equipment selection
The quality of painting 80% depends on the preparation of the room and the correct selection of tools. Your garage should be equipped with powerful lighting, it is advisable to use fluorescent lamps located at different angles to see all the irregularities and defects of the surface. Dust is the main enemy of the painter, so before the start of work, it is recommended to hydrate the floor with water to nail the settled dust, and wipe all surfaces with moist rags.
To work, you will need a reliable compressor with a receiver of at least 50 liters, which can provide stable pressure in the system. It is better to choose with an inch head of 1.3-1.5 mm for base and varnish, as this is a versatile size for most automotive enamels. It is also important to take care of your own safety: a respirator with carbon filters is a must, as solvent vapors are toxic and can cause serious poisoning or allergies.
- 🎨 Krascopult with the adjustment of the torch and the feeding of the material is the main tool of the painter.
- 💨 compressor with a moisture separator - ensures the absence of water droplets in the air.
- 🎭 Respirator. And protective suit -- protecting the airways and skin from chemistry.
- 💡 Lights or lamps - for qualitative control of the application of layers.
⚠️ Warning: Never use open heaters with an open spiral element for drying paint - solvent vapors are explosive and can ignite from a spark!
Pay special attention to the air purification system. The moisture separator should stand directly in front of the spray gun, and not only at the outlet of the compressor. Condensate formed in the hose can get into the paint and cause defects in the form of craters or matte spots that cannot be removed by polishing.
Technology of body preparation for painting
Surface preparation is the most time-consuming stage, which takes up to 70% of the total work time. If you plan to paint a car with your own hands in the garage, you should understand: poorly prepared metal will not hold the paint, and after a short time it will begin to swell or peel off. You need to start with a thorough car washing with special shampoos that remove bitumen and silicone, after which the body is dried and degreased.
Then comes the grinding stage. Old paintwork must be wrapped with abrasive P400-P600, and if there are foci of corrosion or deep scratches - clean to metal. The unevenness is used to equalize the irregularities puttyIt is applied in thin layers, allowing each to dry according to the instructions. After drying, the putty is grinded, gradually reducing the graininess of the abrasive to achieve a perfectly smooth surface.
☑️ Checklist for body preparation
The final stage of preparation is the application of soil. The soil fills the micro scratches from grinding and provides the paint with metal adhesion. After drying the soil, it also needs to be slapped with an abrasive P800-P1000 to remove the shaft, but not wiped to metal. Before painting, the surface is again thoroughly degreased with antisilicone.
Preparation of paintwork materials and setting up of spray gun
Proper preparation of paint is a science that requires precision. Components (basic, hardener, solvent) must be mixed strictly in proportions specified by the manufacturer on the bank, using measuring tanks. Violation of proportions will lead to either long drying and leakage, or too rapid drying and shaking. For garage conditions where the temperature can fluctuate, it is important to choose the correct evaporation rate of the solvent: fast for cold, slow for heat.
The spray gun is set up on the test surface. Three parameters are regulated: the width of the torch, the amount of paint supplied and air pressure. The optimum pressure is usually 2.5-3.5 atmospheres at the entrance to the pistol, but the exact values depend on the viscosity of the paint. Viscosity of paint checked by a viscometer - this is a funnel with a hole, the time of leakage of which determines whether you need to add a solvent.
| Parameter | Value for the Base | Importance for Lac/Grunt | Control tool |
|---|---|---|---|
| Diameter of a duo | 1.3. - 1.4 mm | 1.5 - 1.7 mm | rod |
| Pressure. | 2.0 - 2.5 atms | 2.5 - 3.0 atm | Manometer |
| Viscosity | 16-18 seconds | 20-25 seconds | Viscosimeter |
| Torch | 20-25 cm | 25-30 cm | Test on paper |
What is "milk" in paint?
Milk is a condition of paint when it has too much solvent or it is not mixed enough. When applied, such paint gives unpainted areas and after drying looks matte and loose, requiring a complete repainting of the element.
Remember that the life of the finished mixture is limited. After adding a hardener to the varnish or enamel, an irreversible chemical reaction begins. Usually the "viability" of the mixture is from 2 to 4 hours, after which the material begins to thicken and loses its properties, so it makes no sense to cook a large amount of paint at once.
Paint and varnish application process
The process of painting requires a certain skill and rhythm. Keep the spray gun must be strictly perpendicular to the surface at a distance of 15-20 cm. Movements should be uniform, with a 50% overlap of the previous passage. The first layer of paint (base) is applied in a thin, almost transparent layer – this is the so-called “sup” that improves grip. Don’t try to cover everything up the first time, it will lead to leaks.
Between the layers, it is necessary to withstand interlayer drying, usually 10-15 minutes at room temperature. The surface should become matte, which indicates the evaporation of the solvent. In total, 2-3 layers of the base are applied to complete overlapping of color and old coating. After drying the base (usually 30-40 minutes), you can start applying the varnish.
- 🖌️ First layer The lacquer is applied finely for clutch.
- 💧 Second layer - main, wet, until the appearance of gloss.
- ✨ Third layer (Control) - to eliminate defects and alignment.
Lacquer is applied with more fatty layers, but it is important not to overdo it. If you see that the varnish begins to “swim” and collect in drops – immediately stop spraying. Acrylic lacquer After polymerization, it gives a deep gloss and protection, but only if applied correctly. The movements during varnishing should be even smoother to avoid stripes.
Drying and elimination of paint defects
After applying all the layers, the car should dry. In garage conditions, natural drying can take anywhere from 24 hours to several days, depending on the air temperature and type of materials used. To accelerate the process with heat guns can only be at a certain stage, when the solvent has already partially evaporated, otherwise bubbles form on the surface. The optimum temperature for drying is 20°C.
Even experienced craftsmen sometimes have defects: shashaven (orange peel), dust or small flows. If the varnish is completely dried, these defects can be eliminated by polishing. The scald is removed by grinding the abrasive P2000-P2500 with water, after which the surface is polished with pastes of different abrasiveness. This gives the coating a mirror shine.
⚠️ Please note: Do not start cleaning immediately after painting! The polish should gain hardness, usually it takes at least 2-3 weeks, otherwise you will simply rub it to holes or leave holograms.
If a serious leak has formed, do not try to remove it immediately. Wait for the varnish to dry completely, then gently cut it with a sharp blade or grind locally, after which polish the transition. A gross mistake is to rub a fresh stream with a cloth, this will only smear the material and spoil the texture around.
Finishing and care for new coating
After you have completed all the work and polished the body, a period of careful operation begins. The new coating is finally polymerized (gaining maximum strength) within a month. At this time, it is not recommended to wash the car with chemicals, use automatic washing with brushes or park the car under trees where tar or bird droppings can drip.
To preserve the shine, use special shampoos for cars with wax or ceramics. Regular washing and periodic treatment with protective polishes will prolong the life of your work for many years. Remember that high-quality painting of cars with your own hands in the garage is not only a money saving, but also a matter of personal pride that requires constant care.
Save some varnish and paint after working in a tightly closed jar. After a year or two, they may be needed for local coloring chips, and getting into the color will be much easier, having the original mixture.
The quality of the final polishing depends on the time of full polymerization of the varnish - do not rush with this stage, so as not to spoil the result of the monthly work.
Frequently Asked Questions (FAQ)
Can I paint my car in the winter without heating?
Painting at temperatures below +15°C is highly undesirable. Paint and varnish will dry too long, which will lead to the settling of dust, the formation of shaking and possible clouding of the varnish (the effect of "whitening"). In addition, in a cold room, it is more difficult to control humidity, which is critical for the quality of the coating.
How many layers of paint do you need to apply to completely cover?
Usually 2-3 layers of base (colored enamel) are required. If you repaint a black car white or yellow, you may need 4 or more layers, or use a special white substrate so that the old color does not shine.
What is better to wash away the varnish leaks after drying?
It is best to use abrasive materials: P2000 sandpaper on a bar or special abrasive sponges. Chemical washes of paint can not be used, as they can damage the structure of the varnish and leave matte spots that cannot be polished.
Do I need to remove all the details of the body before painting?
To obtain factory quality ("like a factory"), it is desirable to remove handles, moldings, headlights and mirrors. This will allow you to paint the ends and avoid visible borders (crossings) of paint. However, budget repairs often use the method of pasting and painting in the collection, which requires very careful work with the boundaries.