I'm finally getting caught up on some of my aluminum cleaning. Just a few before and after pictures. Aluminum is really easier to clean than you might think. Each of us has our own views as to what the finished product should look like. You can buff and polish aluminum to a mirror finish, but that's not always how it was sold. I like to try to get it back to as close to original condition if I can.
What I use is the self-cleaning oven, cream of tartar, Mother's Mag and Aluminum polish, and a light buff with 0000 steel wool.
One caution, you need to know your oven. It should run at about 900F. Aluminum melts at 1,200F or so, lower with some alloys. If your oven runs at 1,000F or more (it shouldn't, but might), it could melt a piece. I've used mine enough to know that there isn't any danger.
First, handles off and a run through the oven. Then into the hot cream of tartar solution to remove any corrosion for 30 minutes (the black coating or darkening of the surface that remains after the oven). I actually have it simmering.
Then I decide if any more work, other than a quick steel wool buff is needed. Sometimes it is not. You'll see an example.
So here are some pictures.
First, a aebleskiver pan. There is some corrosion in the cups but it cleaned up pretty decently. I did apply the Mother's to the top, it really helped clean, but the bottom was so nice after the cream of tartar I just left it. I'm still working on the handle with the Formby's and Tung Oil.
Tom