I have recently found a different series of radial bristle discs
from 3M they are being sold to the auto finishing industry. They
have a heavier stiffer bristle and a coarser grit (36, 50 & 80) than
the ones in the jewelry catalogs. They are 6" diameter 8 ply discs
for use on a polishing motor. If you need to remove lots of material
on difficult surfaces you will love these. I found them at Eastwood
http://eastwood.com an auto restoration / customization supply
company which has a lot of tools and supplies that can crossover to
art metal and jewelry uses. I have suggested to Rich Bohr that 3M
market them to the jewelry industry but untill then the disks are at
check them out for your more aggressive finishing problems.
Jim Binnion
James Binnion Metal Arts
Phone (360) 756-6550
Toll Free (877) 408 7287
Fax (360) 756-2160
@James_Binnion
Member of the Better Business Bureau