I have some aluminum parts that have heavy white aluminum corrosion on them. Is there something I can soak them in to break this up? I would just sand or steel wool the corrosion off, but some of the parts have aluminum badges/tags on them, and I am trying to preserve the images on the tags as best as possible. The images/paint, seems to be pretty much intact under some of the corrosion. I tried CLR on them, didn't seem to do much. But maybe I didn't soak for long enough. Does anybody know of a way remove this?