They will be felt wheels designed for high rpm/grinders. Polish looks like regular car type compound (3M, Bosch all make them. Go through wet and dry silicone carbide paper first 600 upto 1500 or 2000 grit then medium/fine compound will see a good result.
Nicely done...but you should really finish the video showing off the bike...with out the next video cards in the way. We can't see what the true finished product look like. Save a bit of space after showing the bike to place your video cards.
