Pinched this out of my grandmas cupboard, because it is nice and heavy, but I don't know what it is or if it's good to use. Is it meant to be a steel finish on the inside, or maybe it was teflon? My grandma is terrible at cleaning, so I've given a scrub. The inside-sides were patchy black like the base, but came off real easy with the scourer. The inside-bottom is stuck on there good however. The outside-sides were also covered in crap, but they scrubbed off ok.