Clean parts?

[NONE_too_SOFT]

New (used) calipers for the new brakes. had to replace the right side cause apparently these pieces of shit arent designed to withstand impacts with guard rails at high velocity. They've been sittin for a while and those bolts holding the blocks together are nasty looking.

Best way to clean em? think i'll have to actually take apart the caliper? i've never stripped em down anymore than they are right now.