I have already stripped the skillet with oven cleaner. There is some kind of discoloration around the Griswold logo. It kinda looks like rust but it seems like it is deeper in the metal instead of on the surface. The surface feels smooth to the touch. In any case, I still soaked it in a vinegar and water solution to get rid of it but it is still there. This is making me think it isn't rust. Can the iron turn a brown/rust color just from heat? I don't want to screw this pan up. I want to get it in as good condition as I can before I season it. I have attached a picture that will hopefully show what I am referring to. Opinions on how to proceed?


