Clean the stone well with a stone cleaner. Most stone cleansers are available in spray bottles. Spray the cleaner directly onto the stone and buff it dry with a lint-free cloth.

Dampen a chamois with water and use it to buff the etched or dull areas of the marble or granite. The chamois will restore the shine if only minor scratching, etching or dulling has occurred.

Apply a shine-enhancing sealer to the counter. Pour the sealer straight from the bottle onto the stone, and then continue to buff with the chamois. The chamois combined with the shine-enhancing sealant will restore a high gloss to the marble or granite, while providing a protecting layer of sealant that will help prevent further harm to the stone.