Eric: The only thing I have ever done is simply polish it. Use wet sand paper and oil. Start with about 600 grit and if that doesn't cut it off work down till you find one that will. Once you get the corrosion you can reverse the process till you get up to about 900-1,000 than finish off with Mothers. Eric Woodall <eric@xxxxxxxxxxxxxx> wrote: Does anybody here have any experience finishing a corroded piece of aluminum? I have a few pieces of jalousie windows that need to be cleaned up. They all have lots of corrosion on the surface. In fact upon first glance it looks like you could wipe if off with some sand paper or scotch bright pads, but it just simply won't come off. I have read on the internet that hydrochloric acid will remove corroded parts of aluminum, but this leaves the aluminum dark gray in color. So do any of you restoration specialists have any answers? I can provide a picture of the corroded piece if necessary.