Quote Originally Posted by Brighty83 View Post

I have done a google for SiC (silicon carbide powder) powders on float glass but i cant find much. The lowest grit i could find was 120. Do you have a site you recommend of the powders and the glass?
Shapton sells abrasive powders for use with their cast iron lapping plate. I don't know what the material is and, frankly, I'm too lazy to look it up :-). Check their site, I would assume that Shapton has given some thought to what would work well as a lapping compound.