tub drain removal - Arrrrgh!
I'm dealing with a rusty tub drain circa 1947 in a cast iron tub that was recently refinished. I need to either replace the drain flange (from above) or de-rust and coat it with something to make it shine again. I tried to remove it with a dumbbell (the drain tool for this), but this thing is seized. I even tried to lever it off with the dumbbell and a wrench and hammer, but to no avail.
Any ideas? If I can't get it off, any other options? Can I hit it with naval jelly and coat it with something? Thanks.