I asked at a little hardware street in my neighbourhood and the clerk told me that wood bleach in Canada had recently been changed to exclude a certain ingredient, namely oxalic acid. He wasn't sure why but he told me that he thought it was because it was linked to cancer.

I don't know if that is correct but it would certainly explain the problem I have had finding this stuff up here, our government is pretty strict on regulating these sorts of things.

Do the ingredients listed on the wood bleach actually use the words "oxalic acid" or would it be called something else?

Other than oxalic acid, what would be another good way of getting the same or similar results on a bike frame? This is for my Ciocc. I finally got some decals and before I get it painted, I was thinking it would be a good idea to soak the frame in oxalic acid to get any rust problems within the tubes solved.

Thanks for any input.