Do you mean the metal frame on it? If so, get a brass brush to remove most of the rust, wipe down with mineral spirits to remove residual dust, tape off the mirror itself, and spray with a metal paint.
I have a plastic chair mat under my computer desk that the edges are curled and won't lay flat. Have been unable to bend them back as the plastic is hard
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Do you mean the metal frame on it? If so, get a brass brush to remove most of the rust, wipe down with mineral spirits to remove residual dust, tape off the mirror itself, and spray with a metal paint.
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Thank you!