I have a marble top table that has been outdoors in the sun and rain for more than 5 years. Now the table top is dull and I would like to restore it, since I now have a screened patio. I would appreciate it if somebody can give me any advice. Thanks.
There are brush-on or sponge-on products that will coat the marble to make it look shiny again. One is Marble Shine-N-Seal, made by Custom Building Products. I've used this on interior marble, and on dulled black trim on my stove. Apply a thin film and let it dry- don't rub or polish it!
Outdoors, I recently experimented (emphasis on "experiment"!) with concrete sealer on a marble mosaic sundial pedestal. So far, great: attractive glossy finish. Product: Concrete Cure 'n Seal, made by Sakrete.
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