Thanks, I remember seeing a picture of an 0V-20 that someone here restored years ago and if I remember correctly they used some kind of metal cleaner and it made that light look like fresh out of the box !
Metal cleaner is really not good in my opinion. A good coating of high temp Krylon semi gloss would do the job and I have done this many times. Just no wind or sun when you spray and do not get in a hurry. I you use the real shiny aluminum paint it will show streaks because it dries fast and when you overlap, you get a rough line between the two sprays. At least I did.
Hope this helps.