Doing that very thing on my 67 Taillight housings. They had corrosion and pitting in the channels, started by bead blasting the housing after masking off the polished trim. Then had to use my die grinder to clean up the pits and flakes of chrome. I mixed up some 2 part glaze and put it in the channels as thin as i could. Am sanding out and will re-mask before painting. Thinking about spraying a self-etching primer first, letting it flash then following with chassis black POR 15. Just my idea.
