Just curious.
From the original REA description, it sounds more like rust than grime.
"The offered sign (13.25 x 6 inches) displays heavy surface wear commensurate with its age and former use, including oxidation and small abrasions."
Does distilled water take off rust? If not, what does? I would imagine it would have to be something acidic although I am out of my depth.
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My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
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