3M Wet or Dry Sandpaper uses sharp silicon carbide grain on a waterproof backing, so you can sand wet to flush away swarf or dry for fast cutting. 400 grit Super Fine is the workhorse grit for automotive finishing and between-coats sanding - it knocks down dust nibs and orange peel without cutting through the topcoat.

• Silicon carbide grain - sharp, fast-cutting, smooth finish
• Waterproof backing for wet sanding; reduces clogging and dust
• 9" x 11" full sheets - tear into thirds or quarters for pad sanders
• Between-coat sanding for varnish, paint, and clear finishes
• Wet-sand bare metal before primer to smooth and clean in one step
• 5 sheets per pack

Tip: When wet-sanding, keep the surface lubricated with water and a drop of dish soap. The film prevents the grit from loading up with residue and helps the paper glide smoothly.