Paid a few bucks for this and thought I had a decent pan to work with. Bottom was completely crusted so that you could hardly see the heat ring or the notches. But that cleaned up alright.

The inside was fairly smooth but looked like it needed a good cleaning before re-seasoning. Wish I had before pics.
After using the oven cleaner on it, all the seasoning was gone and these craters started to form. The more I scrubbed with the chore boy scrubber, the more craters showed up. You can see and feel that a roughness runs about 1 inch up the sidewalls.

My guess is that someone found this pan in a rusty condition and filled it an inch deep with vinegar. Then quickly seasoned it for sale to the first dummy willing to buy it.
What do y'all think happened here?

The inside was fairly smooth but looked like it needed a good cleaning before re-seasoning. Wish I had before pics.
After using the oven cleaner on it, all the seasoning was gone and these craters started to form. The more I scrubbed with the chore boy scrubber, the more craters showed up. You can see and feel that a roughness runs about 1 inch up the sidewalls.

My guess is that someone found this pan in a rusty condition and filled it an inch deep with vinegar. Then quickly seasoned it for sale to the first dummy willing to buy it.
What do y'all think happened here?