Putty
Puttying prior to painting allows you to restore the geometric surface of the repaired body panel. Many types of body putties are produced, but putty with a hardener behaves best in work, you just need to strictly follow the manufacturer's recommendations. Putty is applied with a flexible rubber or plastic applicator. Mix a small amount of putty on a clean wooden or cardboard surface, sparingly using the hardener.
Puttying is carried out in the following order.
Prepare the metal surface as described above.
Prepare putty according to manufacturer's instructions.
Use an applicator to apply putty to the damaged area of the body panel. To achieve the desired surface contour and putty level, each stroke of the applicator should go through the entire surface to be repaired. As soon as the contour of the putty surface approaches the contour of the undamaged surface, immediately stop applying the putty, as it will begin to stick to the applicator, forming lumps and leaving scuff marks.
Apply layers of paste at intervals of about 20 minutes until the level of the putty surface is slightly raised above the surrounding metal of the panel.
Allow the treated surface to dry completely and harden.
Remove excess putty with a waterproof sandpaper: first coarse grit type N-180, then, gradually reducing the grit, finish with N-600 sandpaper. It is recommended to use imported materials due to the higher quality of the abrasive and lining.
For best results, it is recommended to pre-wrap (or stick) paper around a wooden block (You can use rubber or foam).
Moisten the sandpaper with water regularly and abundantly during the processing. Carry out the work until the absolute smoothness of the treated surface is achieved.
At the final stage, the treated surface should appear as a disk or oval of clean surface, ending with a gradually fading edge of well-preserved paint.
Rinse the treated area with plenty of running water to remove the smallest abrasive particles formed during the grinding process.
Dry, degrease and dry the surface again with a hair dryer.
Apply a thin layer of primer from an aerosol can, thus revealing all defects made during grinding.
Eliminate the detected defects by applying a layer of fresh putty.
Repeat the sanding and sanding steps.
Repeat the steps of puttying, sanding and priming until you get a satisfactory result.
Finally, rinse the treated surface with running water and dry it - the surface is now ready for painting.
Coloring
Painting of the panel surface must be carried out in a dry, clean and pre-ventilated area. The air in the room must be dry, clean and still.
Carry out coloring in the following order.
Select the section of the panel to be painted; cover the rest of the surface with thick paper, secured with adhesive tape. Leave a 50 mm wide area of the undamaged surface open around the perimeter. thin paper (newspaper) use in multiple layers.
Before painting, check the operation of the spray gun or aerosol can on the supporting surface (cardboard) and practice the coating technique.
Prime the surface. The required thickness is achieved due to the multi-layering of thin primer layers. Dry the surface to be treated before applying each coat of primer.
Sand the surface with moisture-resistant N-600 sandpaper, not sparing running water. Achieve an absolutely smooth surface.
Let the soil dry completely.
Apply a layer of paint, again achieving its thickness through several layers (3–5). Apply layers «wet», allowing the previous layer to dry slightly.
Start painting from the center of the repaired area, moving your hand with a spray gun (spray can) in a spiral, expanding the reach until the entire damaged surface is covered, as well as a ring of the surrounding surface with a width of approximately 50 mm.
After 10-15 minutes, not later, after applying the last layer of paint, remove the paper and adhesive tape that covered the body panel.
The paint is completely dry (polymerizes) in two weeks.
Only then proceed to leveling the color transition by treating the restored surface with a very fine sanding paste.
Finally, apply a coat of AB-70 wax to the restored panel. If less than 4 years have passed after painting the body, then you can use car polish.
If after the application of this technology it was not possible to achieve satisfactory results, you can use the PMA-2 grinding paste. If this does not help, then you will have to completely repaint the body. Reuse of PMA-2 paste is not allowed.