According to the youtubes, basically you clean it down, apply this blue stuff, then hit it with steel wool/abrasive. Repeat. Then oil like normal.
Has the tubes misled me?
I've got it down to bare metal and ready to go. Or at least close. I need to do the middle 1/4 of the barrel because I couldn't soak it all. I'm planning to make a wooden container to soak it all at once. need to clean out the barrel, but waiting for a new cleaning rope.
Then, I have to decide what I'm doing with the wood. Refinish, or try to clean it as best I can and leave the patina.
It's basically sentimental. It's nearly 100 years old and I would like to restore it back to what it was within reason.