I used some cooktop cleaner on some Sears three speed fenders. WOW! I have been using 0000 steel wool for this sort of thing - no lectures please, I don't have anything of value but this stuff really shines it up! It is probably a polishing compound like stuff what do you think? I couldn't see any scratches. Also what is known about a sachs torpedo 515 hub with the coaster brake? any good?