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I have some rough red coral with white or grey deposits on it. Is there a way to remove it?

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asked May 25, 2017 by lawest20 (120 points)

1 Answer

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3 parts water to one part bleach. Try with one small piece. Soak for a couple hours then remove and let dry. This is a recommendation from another source. I have not tried it. If you get no color loss and it cleans the stuff off you'll know if there are any adverse effects.
answered May 27, 2017 by Weasel (58,810 points)