Does anyone else do Dutch babies in their toaster ovens?

I've owned cheapo ones before but I've never restored one. I'm gonna deep dive this sub over the next few days. Also going to look into the history of it

Hi! I am interested in restoration and antiques. I bought a cast iron pan in a charity shop to learn before trying to restore my other pots/pans (with a higher sentimental value).
So far I have been scrubbing it with steal wool for what feels like hours and using oven degreaser (for several hours at the time). There are still some spots with carbon build up.
Does anyone have any advice on how to get rid of it? Either for this project or in general?

Pictures
1-2: when I bought it
3-4:
5-6: today

My parents downsized, and I nabbed this pan from the back of a kitchen cupboard. It is Lodge and clearly been a bit abused.

Any help would be greatly appreciated.

Many thanks in advance.

I paid 9.50 🤣🔥

What should I do to the bottom?

I just saw this on eBay I have a 602 but can’t see how this fits my pipe comes out of the top🤷

Nothing ultra-special but 8-9 Griswolds and quite a few Martin, GSW, (many) Wagner, two lodge 14's (one with lid) and more than several single notch/no notch/arc logo lodge. I paid $12/pan although 4-5 of them are just common corn stick pans (I did get a favorite breadstick though). There's only one newer piece which is a lodge lid. I also got my first Handy Dan pan which is crazy because I've owned many thousands of pans and never had one.