I don' t recommend spraying Brake parts cleaner in your air bleeds while the motor is running in a garage..even with the garage door open, it gives off a bad odor, the kind that takes your breath away..
Muratic acid works well to clean aluminum parts, but!! Use safety measures needed handling acid and don't leave it on to long or it will turn the part black. Test it on something alum. that is not important to get a sense of the time it takes. They used to sell it in squirt bottles for uncoated aluminum wheels before we all became to dumb to protect ourselves. And I say that with tongue planted firmly in cheek.
well my dad used to own a old school printing buisness with all the giant machine and what not and i was back there cleaning ink off of it with meratic acid when i was 8 hahahaha :P
car quest brand brake cleaner and carb claener alumi-brite works good on aluminum but need resperator caution never trust labels in shop guy changed barrel when refilled acid and alumi-brite acid aluminum rim dont mix well bosses head explodes