Hey all....quick question. I didn't see a sticky for pipe repair questions so I thought I'd just make a new thread and ask. I've decided to give a few badly oxidized stems a bleach bath, and left them in for an hour, as I've heard is normal. I coated the lettering and tenon with Vaseline to prevent the bleach from eating away at them too. Now, I left them in for an hour and then checked both stems, but some of the oxidation remained. Can I leave them in the bleach for longer or will it damage the stem in some way? Thanks in advance ;-)