I had a basement flood in the spring. Water got into the wrapper of about a dozen 31 mm reflectors and stayed wet for several months, with surprising results.
The shiny relector coating was removed by the moisture (off of my 31 aluminum reflectors) . I am assuming these are really aluminum (not magnetic) with a vapor deposition of some shiny stuff.
Is there any way to bring these back to a shiny condition, economically?
They turned partially bronze where water was in constant contact. Alas, per an anti-annodization tip, I was able to make one totally bronze by soaking it in sodium hydroxide.
Be interesting to see what the bronze color would do to the beam. But anyway the best thing I’ve found on BLF as far as cleaning reflectors, which yours might need more than “cleaning”, but number one is don’t touch it with anything. Second is use your tongue and distilled water. I’ve personally tried it several times and I haven’t found a better way. A little dawn, run the distilled water through til it’s gone, then insert tongue and twist, more distilled water. Repeat.