If the scratch is superficial and does not affect the metal of the panel, it is extremely easy to repair.
1. Lightly rub the scratched area with fine sanding paste to remove loose paint particles and wax.
2. Rinse the treated surface with clean water.
3. Using a small brush, paint over the scratch with the paint used for the exterior coating of the surrounding body panels.
4. Continue applying the paint layer by layer until the surface of the paint inside the scratch reaches the level of the surrounding surface of the panel.
5. Allow the new paint to cure for at least two weeks, then sand the transition surface flush with the rest of the panel using a very fine sanding paste.
6. Finally, coat the treated surface with wax.
7. If the paste has penetrated the paint, reaching the metal of the panel and causing it to corrode, another repair technique should be used.
8. Use a penknife to scrape off powdered rust from the scratch, then treat the surface with inhibitor paint to prevent future corrosion.
9. With a rubber or nylon applicator, cover the treated damaged area with a glossy type putty.
10. If necessary, which is especially useful when filling narrow scratches, the putty can be thinned with a solvent to form a very fine paste.
11. Before the gloss putty hardens inside the scratch, wrap your fingertip with a smooth cotton cloth.
12. Then, after soaking your finger in the solvent, quickly run it along the puttied surface of the scratch. This will make the surface slightly concave.
13. Now, after the putty has hardened, the treated scratch can be painted in accordance with the instructions in paragraph Puttying and painting.
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