I have recently acquired an early Griswold slant ERIE #7 skillet with very roughly cast handle and outside bowl surface. The surface areas are very porous and "pimply", not like any other Griswold's Ive encountered. It doesnt seem to exhibit severe deep rust or gas pitting such as is frequently encountered around the logo area on many pans, but is evenly "grainy". However the inside cooking surface, and bottom bowl surface to include everything inside of the heat ring, is smooth as a baby's a**. After lye bath cleaning this pan, I dipped it for an hour in a vinegar bath, and quite a bit of liquified surface rust came off these rough surfaces. I'm wondering if this pan is the victim of rust (albeit only on the aforementioned surfaces), and if so; why is there none on the cooking and bottom surfaces...or was it just rough cast on the handle and outside bowl areas; having been highly factory ground and polished in the other areas? Has anyone out there ever encountered another Griswold like this? Any opinions or feedback is, as always, welcome. Thanks and best regards.