a/s HAS painted trailers and mohos made from aluminum.
bigAl has a 94 that's painted and it looks fantastic.
my 70s moho was painted and looked BETTER than new.
perhaps u've seen these threads...
while the older (and current) plastiKote has a shorter life, the newer alcoa finish is NOT replaceable...
so pick your poison.
another option is stripping a new unit and polishing.
the newer/harder alloy skin will polish fine
and corrode more slowly than traditional older skins (and without filiform corrosion)
so depending on exposure, wax/sealant and so on, applying plastiKote may not be needed...
for ease of use, simple care and camping without the hassle of maintaining...
silver paint (or other colors) is a reasonable option.