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Citric acid and rust

grannyknot
in Shop Talk

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Yeah, really nothing to lose. Just soak them again in the citric and see what happens.

I had some black staining on certain parts, but it was the higher carbon stuff. Things like that pulley worked fine, but I did find that the original zinc (assuming that's was actually going on) was thicker in some areas than others and took longer to come off.

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