Seems like an ideal rust removal option. For those of you that use it: what sort of container do you use when soaking razors in the stuff? From what I read on the packaging, it's "safe on most materials". But would it eventually eat through something like a disposable Tupperware? Also: is there any kind of gas production? I'm not really worried about fumes, but if I need to put a lid on it to safeguard against spills during the soak, it would be pointless if gasses just popped it off anyway lol.

Looking forward to your thoughtful responses!

Sincerely,
Crawler.