I believe this is Nickel but not sure, Pic link below, 2 before. After photos are post 1 week basement lye bath (fairly cool down there), 30 min vinegar/water soak,SS scrubbing and stove top drying. The darker center of the bottom flash rusted as it dried, the whole outside was silver after scrubbing. The last pic shows some wearoff of the finish or shinier areas along parts of the bottom edges; these areas did not flash rust. I saw some of the cleaning recommendations on here, thanks, yet did have some questions. I assume I would need to season the whole pan in this case. And RE: polishing with Mothers, this is before seasoning, correct? Also, I'm a little concerned as to whether the cooking surface is bare cast iron or just a worn through nickel surface? I can see some level finish on the spouts as shown in pic. It has been back in lye bath for several more days now in hopes of getting rid of the surface dark spots. Thanks for the help!
https://drive.google.com/folderview?id=0B8_C1PMVKebOeWc2czBZc2tuYjA&usp=sharing
https://drive.google.com/folderview?id=0B8_C1PMVKebOeWc2czBZc2tuYjA&usp=sharing