I recently bought a couple satin finish wheels (from Rio) for my flex
shaft. I bought medium and fine. They seem kinda like Scotch-brite
with some abrasive. I refinished a piece recently, and really liked the
effect. It's a sterling bear silhouette overlaid on black onyx. For
some reason, the satin finish on the face really works better than a
high polish. I left the sides of the setting highly polished for a nice
contrast. Maybe the polished onyx and polished silver were too much...
Anyway, I like the wheels, you might want to check them out. I've
always had my eye on a bead blaster, but have never had a chance to play
with one yet!