What's the best inexpensive cleaner for water/gas marks on aluminum
Is it polished or natural finish?
I beleive it's natural....it's not that high shine mirror looking style.
With a natural finish about your only option is to media blast it clean.
If you're not in a big rush for it and it can sit at the shop until they're
doing another job like it you'll probably pay $20. If ya gotta have it now
expect closer to $50.
If it has to be done on the car, well good luck. I don't know of any chemical that with safely or effectively get it clean. If anybody sells something to do the job it will be http://www.eastwoodco.com/. Lucky for you they're also in PA. Good luck.