I have 2 more 8" that were too rough and are in the rehab process.
How do you do rehab a rough iron casting?
Angle grinder?
John
I've been away and missed this John. Sorry.
I put the pans in my gas grill on high and burned them down to bare metal and finished the clean-up with a twisted wire cup in an angle grinder. When I'm in the garage doing things, I set my 1/4 sheet Makita random orbit finish sander w/ 60 grit inside the pan. It jiggles around and bounces off the edges. I'll use progressively finer paper until it's as smoove as glass. Then season.
Might be better ways, but letting the sander sort of work independently is low labor. It should work. They are Wagners pretty cheap from a 2nd hand store, so little to lose and lots to gain. I like that ratio.