It gets easier to reassemble the 510s after you've pulled them out a few times. Be very careful about the paint. My 510s were rusting like no other. Uninstalled, sanded down to bare metal, and repainted black with caliper paint. Almost 4 months now, and no rust. Oh yeah, if you need to repaint, make sure you reinstall the rubber seal the correct way! I didn't and it took me much longer than it should've to figure that out!

I noticed when PIAA painted the housings, it was applied in bands. Only the middle band was thick, the other bands were thin and came off quite easily, also the outer bands were rusting off. This happened in about 1 - 1.5 year's use, right outside out of NYC. YMMV, of course