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Treat really stubborn stains in marble with... | Almanac.com

Treat really stubborn stains in marble with...

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Treat really stubborn stains in marble with fresh hydrogen peroxide and a couple of drops of ammonia. (Peroxide loses strength as it ages — check the expiration date on the label.) Pour the mixture on the stain and let sit for several minutes. Then wash, rinse, and wipe dry.

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