[DuSh]

Had some time in between exams so decided to sand down (more like scuff down gently so that surface is porous and ready) and prime calipers.
Given that calipers have factory oem hard black paint - it was very easy to prep them. All you need to do is use 240 grit paper for few spots with scratches and use 400 grit for everything else. Took me 20 min to mask and 20 min to sand it down and wash it with break cleaner to eliminate all dust