The problem with polishing old aluminum wheels is that they usually have some kind of clear on them and if you don't strip it off first, you'll never be able to get a chrome shine. You can't polish the clear off, but you can strip it off with things like easy off oven cleaner in the can with the yellow kid. Not all wheels have the clear, or the clear is still good, so they can be polished. I had this issue 2 years ago trying to polish the stainless rockers on a 68 Sport Fury. Stipped the clear with Drano crystals and heat, then they polished up better. The fumes can lay you out, so be careful.