I am skinning my trailer with .040 5052 aluminum. After it was delivered the pallet was rained on. The sheets were separated by thin tissue to eliminate scratches in transit but unfortunately they 'stained' the aluminum leaving streaks. The discoloration may be from a mild chemical reaction (paper is acidic) or ? I experimented with a little Mothers car polish with very modest results that may be simply from the abrasives.
Any thoughts on materials or processes to remove the stains would be appreciated.
https://www.amazon.com/photos/all/galle ... 3234696011