Paint sandpaper marks expansion!
Meaning: There are obvious sanding marks on the painted surface.
(1) Causes:
② Improper thinner or thinner ratio is used, and the thinner in the newly sprayed topcoat will penetrate into the old paint layer, which will expand the sandpaper marks.
(2) Correction method:
Dry or wet sand the sandpaper marks until smooth, then scrape putty and spray primer and topcoat.
