Any ideas on how to bring back the black shine on an aluminum black powder coated grille? It has become oxzidized from the sun. It has some fading issues, and some white chalky spots I can't seem to remove. Its been oxidized for several months getting worse, and just noticed the white chalky spots yesterday.

Im ok with a temorary fix if it makes it look better. Only the slates facing up towards the sun are fading.

Have had grille 1 year now.

 

you can try "Back to Black" or might have to get it re-powder coated. I don't think there is anything that will work the way you are wanting it to though. Back to black is amazing stuff but mainly for trim and plastics.