Sorry, I didn't do the search on oxalic on here, but through google, and I probably was quick to jump to conclusions with not a whole lot of resources.

But from what I've read, diluted oxalic acid bath and then a baking-soda rinse to neutralize. But one thing I'm not too clear on, how strong should the bath solution be? I think I read in one of the threads that 2 pounds per kiddie pool and then leave the frame in for less than 24 hours?