Bought a parts washer a few weeks ago, went over to CTire and bought some enviro friendly parts cleaner, figured I'd be using a lot of fluid and might as well try to be somewhat green. The stuff ended up leaving some 'scum' on the part I washed. Not oxidation luckily (its an aluminum part) but just kind of a residue.
I'm looking for something safe on aluminum (preferably non flammable but i havent really found much yet). I've been doing some reading and saw zep 0455 citrus cleaner recommended for aluminum. Hoping this will be able to power through some of the residue. Any other ideas or experience with this zep stuff??