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. Extra Fine grit is a step coarser than the polish grits - good for the first level pass on a topcoat, knocking down runs and heavy nibs before stepping up to 400 or finer.

• 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: Use a hard rubber block when leveling clear coat. The block keeps pressure even and prevents low spots from showing up after polish.