No,really don't know but looks like it would work,they corn cob blast some of the polished tankers.I do not see no reason for it not to work if the cobs do,guess it would depend on how close you where from the alumu. as to its dullish or shinist as in the soda can taking off alittle paint at a time until it fades away.
Hey Luckyboy if you still have your blaster go find some alumu. and polished stuff and try it out and let me and sqruit know something we may out bid each other for yours,,try it on the chrome molding on your truck and let me know if it shines it