What is the solution for dull paint after sanding with sandpaper?
2 Answers
The solution for dull paint after sanding with sandpaper is to repaint. The repainting method is as follows: 1. Clean the car thoroughly; 2. If the car surface is too smooth, use 600-grit sandpaper to sand it until it feels rough, which helps the paint adhere better and prevents peeling; 3. When spraying paint, hold the sprayer about 20 cm away from the car and spray evenly, applying multiple coats for better results; 4. When applying multiple coats, ensure a minimum interval of 10 minutes between coats to allow the paint to dry and avoid sagging; 5. If sagging occurs, wait for it to dry, then sand it smooth with 600-grit sandpaper and spray paint from a distance to cover it; 6. After the paint is completely dry, apply a layer of clear coat to enhance gloss, protect the paint, and improve durability.
Last time I sanded my car's paint, I ended up with a matte finish—how embarrassing! As a beginner, I chose coarse sandpaper, which left obvious scratches and stripped the shine. To restore the gloss, I had to start over step by step: first, lightly sand uneven areas with 1000-grit wet sandpaper, then switch to 2000-grit for wet sanding until the surface was smooth. After washing off the dust and drying, I applied polish—preferably a dedicated automotive polishing compound—using a damp sponge in circular motions with even pressure, taking my time to gradually smooth out the scratches. Once polished, I cleaned the surface and applied liquid wax, letting it dry to magically restore the shine. The whole process required effort but saved repair costs. To avoid repeating the mistake, I now test sandpaper grit on a small area first to ensure it won’t damage the paint. Overall, patience is key—practice makes perfect, and it’s a great way to level up DIY skills.
