Dirtmechanic
Garden Addicted
Bar keepers friend is a common product that contains oxyalic acid. OA is lovely at reducing and removing rust. Also a common spray solvent found at hardware and auto parts stores called PB Blaster might help. It is a penetrating solvent that gets left on and will work its way between the threads.This is an old thread, but I’m glad to see it. My son has that same worthless drain in the tub at his house. He took the stopper out and it helped, but still drains slow.
The drain piece in the tub in my house is rusted and I was wondering how to get it out, I’ll have to try the channel locks.