What to Do When the Car Paint Surface Loses Shine After Sanding?
2 Answers
When the car paint surface loses shine after sanding, you will need automotive-specific gloss sealant, coating sponge, and towels. Below are the detailed steps for the operation: 1. First, wipe the car body clean with a damp towel to ensure there are no dust or other particles on the surface. 2. Then, press the sponge onto the gloss sealant, shake the gloss sealant, and pour it onto the sponge. 3. Next, use the sponge to sand the car body, ensuring even friction and rubbing slowly. 4. Finally, use a clean towel to wipe off any excess liquid and clean the car body thoroughly. 5. In the end, you will see the car body shining brightly, with a noticeable effect.
I've encountered similar situations where the car's paint surface isn't shiny after sanding, usually because the sandpaper was too coarse or there was no follow-up treatment. Sandpaper comes in different grits, with 800-grit and above considered fine sandpaper. Coarse sandpaper leaves deep scratches and removes the gloss. The purpose of sanding is actually to remove old scratches or oxidation layers, but if you don't polish afterward, the surface will become matte. Before polishing, you need to wet sand using 1000-2000 grit sandpaper with water, applying gentle pressure to avoid damaging the primer. Then, use a polishing machine or a manual polishing cloth with professional polishing compound, working slowly for a few minutes to restore the shine. Finally, apply wax for protection—it's like putting a layer of clothing on the car to block UV rays and prevent oxidation. I also recommend regularly checking the paint condition to avoid frequent sanding and extend its lifespan, as this job requires patience and attention to detail to do well.
