Shouldn't be a problem on aluminum.
Stainless steel either.

I've been running a couple of aluminum intake manifolds - one for about 12 years - that are powder coated black.
They still look good.

Same deal with some interior aluminum parts I made and had powdered black.

Pat's advice about hitting the chrome with 320 gritshould work fine.
Better yet may be taking the piece to a chrome tank and having it stripped.
Costs should be minimal since there's no polishing or other chrome plating preparatory work to be done.