First step: Coarse grinding/fixed thickness sanding, using F backing adhesive, backing sandpaper or J soft backing adhesive, backing sandpaper cloth, burnt brown corundum abrasive, anti-static, P40-P80; Or corundum abrasive steel paper sand disc P24-P120;

Second step: Fine grinding and polishing, using F adhesive, back velvet sandpaper or J soft adhesive, back velvet sandpaper, burnt brown corundum abrasive, anti-static, P100-P220;

The third step is to polish the paint surface using F-adhesive, back velvet sandpaper, calcined brown corundum or silicon carbide abrasive, sparse planting sand, anti-static, P240-P400。