well im finishing up my C clamp at last. All what is left now is to beautify the thing, so i opted to polish. Its not necessary but i figure why the hell not.
Well there was this bench mounted sanding wheel and you put this chalky stuff on the wheel, and rub your piece on it and it turns it pretty much black. Then you use the other wheel to wipe it off and your piece shins. Well, what is the chalk stuff?