How coincidental! I just finished mine last week.
Before: pre-combo
I sanded my reflectors down, as they were very rough to the touch. I did not sand the plastic middle reflector, only the metal ones. I went with a moderate 220 grit, and I used a sponge to make it easier. I also took the opportunity to clean up the contactors and the joining strip between the reflectors, as mine was pretty corroded. Once that was done, I was able to get all resistances down to less than 0.1 Ohm. After that, I taped everything up very well with masking tape to prevent issues with the contactors. Once the taping was done, I used Rust-oleum primer + filler (
primer) and gave it a couple coats. I gave the primer at least 24h to dry. After making sure there were no major issues with the primer, I applied several heavy coats of Rust-oleum bright coat metallic finish chrome (
paint) over a few hours. It was tricky for me because it was very cold outside, and the paint would tend to clump and start to sheet off the curved areas of the reflectors. Once it was all done and put back together, it looked like my after picture.
For good measure, I also added a pic with the units back in the car. I didn't take a before picture to compare with, unfortunately. No camera flash was used.