... , fine grit product is suitable for sanding paint surface. L338 Backing: Film Raw Material Size: 1.38m* ... metal, filler, putty, electronic, autobody, paint etc.This material is mainly made into: Velcro sand paper and self-adhesive sanding ... is that it had the hidden super coated aluminium oxide corundum.The difference between it and other conventional coating is, conventional anti-clogging sandpaper is ...