Tom,
I have a very large Club hammered aluminum oval roaster that has dark patches in it also. Can I heat the cream of tartar solution in it, soak the paddles in it, and kill 2 birds with one stone? As far as seaoning, I'll pass on it for this one. I like the aluminum nice and shiney. The base is C I, and I'll just do that like my other C I. I'm a little disappointed, the seller didn't mention that it was aluminum. They only listed it as C I . The paddles are so gunked up, that you can't see the aluminum. No problem though. I'll still keep it. I got it for a good price anyway.
Jeff,
Thanks for the tips on the detailing. This is one that I'm gonna have to sit with, and just take my time. Keeping my fingers crossed that the surface under the gunk isn't trashed. Only time will tell.