Here's the short question: Is there any product that will eliminate the white oxidation stains from a rough cast aluminum surface without having to polish the surface smooth?
Here's the surrounding details if you care to read:
I have an old GSXR 750 Limited Edition project bike that has been stored outside...there are some light oxidation spots on the frame rails. But here's the problem, the frame is an extrusion with raised polished ribs that stand proud of a rough as cast appearing surface. I can get the oxidation off the smooth surface with my aluminum polish...but I can't get the white oxidation stains out of the valleys in the cast appearing surface. I could polish the rough cast portions smooth, as some bikers do, but I don't want to compromise the stock appearance of the frame.