I'm rebuilding my calipers because they had been leaking since getting the disc machined. Unfortunatly they are almost black now, While I can clear away most of it I still cant get it back to that nice clean silver finish. I want to paint them and I imagine the surface must be clean. Ive tried wire brushes, brake fluid, degreasers, thinners, acids, bases (in little test areas- not the whole thing of course) and nothing seems to bring it back. I'd sand it but the surface is rough and it leaves lots of stuff in the pits.
Just how clean does it have to be to be painted? Do I use any kind of heat resistant primer prior to painting?
adam