Necessary tools: touch-up pen, quick-drying soil filling, marking wax, varnish, sandpaper, butt joint gold oil, adhesive tape, etc. (Generally, the whole set of tools is sold online, and the price is generally below 100 yuan, so you can keep it for a rainy day after use). Step 1: Wash the parts of bumper black plastic that need to be repaired with water; Step 2, after the sandpaper is wetted with water, the scraped burr part is polished smoothly; Step 3, after polishing, wipe the repaired part clean with dry cloth or paper towel; Step 4, put adhesive tape around the repaired place to avoid getting it elsewhere; Step 5, wipe the scratches repeatedly with a sponge dipped in decontamination wax until the scratches are removed.
Note that the touch-up paint must be repaired along the scratches, so that the touch-up paint effect will be better, but if it is a scratch that exposes the primer, you have to go to the repair shop for plastic painting.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)