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Oxalic acid on paint

1083 Views 5 Replies 4 Participants Last post by  joecaption
Ever use dilute oxalic acid for tannic acid stains from oak tree? Have a cool deck around my pool, and it has an acrylic outdoor decking coating (paint??). Worth a try?

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Oxalic acid will tarnish metal, but I don't know of any reason you couldn't use it on an intact painted surface.

Hard to say how effective it would be, but I don't think it would be risky as far as damaging the paint.

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