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I have an original Joust cocktail power supply plate. It was heavily rusted with traditional red rust. I took a wire brush to it and removed all the rust, or so I thought.

I oiled the plate and some of the rust came back in the form of black rust. This happens when the rust appears without oxygen exposure (most likely due to the oil covering).

I know black rust is slower to grow, but does anyone have any suggestions on going forward? Should I just use my replica? Should I wire brush it again? Should I just ignore it?

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