Hey mario i have a suggestion.i have aluminum rims on big zeus.when i polished them using alcoa aluminum polish they have a spray to use afterwards called shine sealer.supposedly it will keep the aluminum from oxidation and dulling it especially during truck show season..i tried it once on my rims one year and the shine lasted a few months. It would have lasted longer but truck wash detergents have degreasers in them and pretty much washed the sealer off in a few months.you can try that on sues trailer but do a small test area like underbelly to make sure it doesn't damage it. I only tried alcoa brand but i am sure there are others out there.you can try can tire in the detail section where the polish and wax are.i think turtle wax does a polish/sealer in a white plastic jar with a red top.blue magic polish paste polishes and seals it in one i have used the blue magic it works good.those are some options for you... hope it helps.i use blue magic on a few of my r/c truck rims it also takes out light scratches..but remember test spot first
