3M Contour Surface Sanding Sponge 06964 is ideal for sanding wood, paint, metal, plastic and drywall. The contoured sponge can be used for either dry or wet sanding and can be rinsed and reused. Extremely flexible, softback. 3M Contour Surface All Purpose Sanding Pad has multiple uses. The grit is fine. You can rinse and reuse these pads.