i hit what surfaces i could get to with the wiz wheel and used 500+ degree gloss black engine paint. did thin coats and set each one with my heat gun, it can be a little tricky kepping the paint from getting fish eye. If you get them nice and clean and have the heat gun ready you can avoid that problem. After the paint was set i just ran them up to work and removed all the paint from the pad contact area. Def will smell paint burning the first few hard stops you make but after you are golden.
Hey while i have your attention

Where did you pic up your rear Sp 9000's?
that is a very odd size and i think the only production car with that size tire is the Mercedes ML50..... i havent been able to find them anywhere for under 360$ a peice