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Is it safe to use a sand-blaster on my granite countertop?
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It depends on the type of granite you have. Sandblasting is generally not recommended for granite because it can damage the surface and cause discoloration. However, if your granite has been sealed with a protective coating, then sandblasting may be an acceptable method for cleaning it. You should consult a professional before attempting any kind of abrasive cleaning process on your granite countertop.