Bill Nash
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Yes. It changes the chemical compound of rust to something that is water soluble, and then you can just wash away most or all of the rust. I have used it on old wood I was trying to reclaim.
Bill Nash
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Never tried it with ink though, ... probably works with all sorts of things.
Found the magic trick that removes stains (like rust and ink) from wood: oxalic acid, which is the main ingredient found in Bar Keepers Friend.
I can attest, I tried this and it works.