These sponge blocks are wonderful to use to softly distress your painted pieces. If you do not like seeing brush strokes, these can be used to knock down the surface tension of the strokes, and "polish" whole areas.
Great for contoured, hard to reach surfaces
Rinsable and reuseable
Two sanding grades on one sponge
Mineral on all four sides
Tough, aluminum oxide mineral bonded with flexible waterproof adhesive