Review on 3M Scotch Brite Radial Bristle Discs by Charles Collier

I am trying to use them to remove stains in cracks and crevices on my coffee table so I can polish it. I put 3 out of 5 discs on my drill. This is a regular living room table and I only want to use it for sanding where the sanding block can't reach. Use on a Dewalt cordless drill in any direction will have no visible effect on the wood. 80 grit sandpaper removed all stains from the flat surfaces of this table (down to the bare wood), but this product barely scratched.