Little late to the party here but, I must say you can clear powder coat polished aluminum parts and it works well. It does take some of the luster out but worth it when you cant get to parts that need to be polished. I had that done on my Challenger for the Billet valve covers, power center cover, oil fill cap, washer tank cap. I did not have the blower powder coated because of contamination fears.
Question; don't mean to jack the thread but I'm being told that my chrome shop cannot chrome the grill for my 64 330 because of it's configuration, has anyone had this done? if so where? If it's not possible, I'll take the polish and powder coat route.
thanks