I use this on my hand polished aluminum wheels.
WHITE DIAMOND Metal Polish with Long Lasting Sealant, 12 fl oz is a Cleaner, Polisher and protectant All in one. Removes Oxidation and Discoloration from Aluminum, Brass, Chrome and Many Other Metals https://www.amazon.com/dp/B00MN9RKG8/ref=cm_sw_r_cp_apa_i_zmbaEb9S9FJWV
When I polish, I do a wash and scrub with some purple power, after it's dry hit it with some White Diamond.