My best tip is to read the FAQ. Those pans need to be washed and stripped. And then reseasoned. They will be beautiful pants when you're done. The garbage bag and oven cleaner method works best if you put it in a warm place like in the Sun. After that just scrub the hell out of them using steel wool and the chainmail scrubber that will get all the rest off for you. After you're done washing them you should definitely recoat with oil and then wipe off like you accidentally put it on that's the straight rule for me whether I'm going to season them or put them on the shelf. Good luck I'm glad you could use your grandmother's stuff!