first year polish reply
This trailer had never been cleaned, fortunately there was no clear coat to deal with,
I used products for the first go around from metalwax.com A liquid cleaner that was very caustic went on first. that combined with the oxide to leave a white residue
I then followed up with about six bottles of their metal wax product, it is a cleaner and wax in one.
after that I have used maus(?), and other aluminum cleaners from the auto store, I try to stay with stuff that is aircraft approved,
random buffer to apply polishes, and hand rags to take it off, lots of hours (150), and a little insanity helps. strangely I found the oxidation came off most easily when it was very cold out. after the hose froze up I was carrying buckets of water to wash things off.