I sprayed the stock solid rotors on the rear of an 04 Dakota with regular spray paint. the pads wiped of the paint from the swept surface quickly, but the paint stayed everywhere else, and never burned off.

I would go with a high temp engine paint if you're that worried about it. most spray bomb ceremic paints claim to be good for up to 500-600 degrees. how hard are you going to be pushing your car? how hot do you anticipate getting the rotors?