I bought some sanding sponges at a close out store eight in a pack. The grit wasn't marked my guess was 220 or 320. Always willing to try something new I bought a pack. They work great between coats conforming to the shape of the bowls. These aren't like drywall sponges these are a lot more flexible with grit on two sides about 3x5 and 1/2 inch thick. I went back and bought all they had. I'm on my last pack and started searching finally finding some after 20 some pages. Uneeda Enterprizes has them in boxes of 250. Major Grady from northern abrasives happened to be snowed in when I called him. We had a long conversation. He agreed to split some up. I bought 250 sponges from him 25 each of the 10 grits. I'm hoping one of the turning stores we all buy supplies from will carry these in smaller amounts than the 250 count box.