Work only at temperatures above 12°C, but not in the open sun and not in strong winds.
Rust removal
Paste the contour of the repair site with protective tape (tezakrepp), so as not to inadvertently damage the surrounding paintwork.
Remove all visible rust, as well as rust hidden under the bubbles, with a triangular file or screwdriver, and coarse 120 grit sandpaper.
Sand the edges around the damaged area 1-2 cm over the undamaged surface with 320 grit sanding paper.
Galvanized body parts should, if possible, be cleaned only to the ground, and not to the zinc coating.
Applying an anti-corrosion primer ("Primer")
Remove dust and grease from the repair site with a nitro thinner and a clean cloth and allow to dry.
To avoid incompatibility issues, "Primer" must be from the same manufacturer as the paint being applied. Otherwise, the paint will bubble and wrinkle.
spray "Primer" from a distance of about 25 cm in a very narrow, but covering the surface, jet. Cover the surrounding surfaces with masking tape and newsprint to avoid aerosol mist.
Spraying can be repeated after 10-5-15 minutes of airing. If putty is to be applied at the repair site, before "Primer" should dry well.
Puttying
There are 2 types of putties: two-component and thin. A two-component putty is mixed with a hardener before processing. It hardens quickly and needs to be applied quickly. It is used to level large irregularities in the metal. Thin putty is viscous, small surfaces are leveled with it. It can be applied in several layers. Both types of putty are available in tubes and cans, thin putty is also available in aerosol packaging.
Attention: Although putty cans are often written recommending direct application of putty to metal, in any case it is advisable to prepare with anti-corrosion "Primer"-om.
Apply a two-component putty to the straightened or glued with fiberglass place and allow to harden. Follow the manufacturer's recommendations.
After hardening, smooth out the irregularities manually or with a vibration grinder. Use 180-grit sanding paper for this. Now you can also use water-resistant sanding paper. In this case, moisten the repair site with plenty of water from time to time (sponge).
In conclusion, carefully wipe the place of repair and allow to dry.
With a wide elastic plastic spatula (spatula) apply a thin layer of thin putty to the repair site and allow it to harden for at least 2 hours. On large curves and contours, it is recommended to apply putty from an aerosol can.
Depending on the thickness of the applied layer, a thin putty should dry out from 2 to 3 hours.
Grinding
Sanding paper comes in a variety of grit sizes. The lower the number, the rougher the paper. For sanding a two-component putty, a grit of 180 to 240 is recommended; filler putty and old paint are sanded with 360 grit water. For the final sanding step with water, 600 grit sanding paper is recommended.
Sand the puttied places with 360 grit paper, while keeping a sponge constantly over the repair site. From time to time, immerse the sponge in clean water.
For subsequent wet fine sanding, a special waterproof finishing paper with a grit of 600 is best suited, while the surrounding surface is also sanded. Grind only in the direction of the longitudinal dimension of the vehicle; however, residual small sanding scratches in the top coat are less noticeable.
Cleaning
Before coating with paint, the sanded surface, as well as the surface around it two palms wide, must be freed from traces of grease and silicone. Silicone remover works best for this.
After sanding, carefully clean the area to be repaired and carefully cover all surrounding k parts of the car with newsprint and adhesive tape. When painting the fenders, also protect the wheels and shock absorbers.
Try to paste over the place of repair so that the surface to be painted is always limited to the nearest molding or edge of the body, since a tubercle of paint appears along the edge of the pasting, if the gradual transition of color to the original color is not noticeable, paste it at a distance from the place of repair to the width of two palms.
Moisten the floor to collect dust.