I was watching powerblock on spike last weekend and I think it was extreme 4x4 they said brake cleaner works good to prep metal before painting. (they were doing a frame) So I am going to use it to prep my calipers before painting. First I used a strong degreaser and a rag to wipe them, then hung them and sprayed the hell out the calipers with brake cleaner and I am letting them dry before taping them off and painting them, what do you think? Anyone use brake cleaner as a prep before?