So here is the pan I posted about a couple days ago. I put the pan in the oven and ran the self-cleaning cycle. When it came out I cleaned off the ash and I could actually tell that some of the texture around the edge was the metal and not food. The rest of the gunk was gone.
I put a very thin layer of canola oil on it and baked it at 450 for an hour. It looks beautiful now. I’m going to do a couple more seasoning cycles and then try to maintain it.
Thanks everyone for the advice!
My oven no longer works properly after the last self clean. The preheat cycle doesn’t stop at the designated temp — it just keeps getting hotter and hotter until it shuts down with an error.
I think self clean is quite bad for the electronics in the oven. Electrolytic capacitors are an example of one type of component that gets damaged over time by heat: the electrolytes dry out and the capacitor fails.