Q. My marble coffee table has white stains that I cannot get rid of. Is there a cleaner to remove them?

A. Unfortunately, what you are describing are not stains, they are acid etches. The stone has been chemically etched by the neutralization process that happens between calcium (the main ingredient in marble) and the acid applied or spilled on your table top. You may need to call a professional restoration contractor to refinish your stone. If you do not have one, you can contact us. If the etching is not severe, we recommend that you first try to polish your stone using etch remover marble polish. Understand this it is not cleaning—it is polishing the stone much like jewelers rouge. Please note that etching can't be removed with a cleaner, however, improper cleaning products may actually cause etching. You want to make sure always to use only stone safe, high-quality cleaning products. 

For more information read this article.