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There are several products on the market that will remove mildew from tile, but they will also etch any polished marble surface. I suggest the following technique: Dilute one cup of household bleach in one-half gallon of cold water; add several drops... Read More

Several products are available at the grocery store for removing soap scum, but they most likely are not safe for natural stone. Most soap scum removers contain acids which should not be used on marble surfaces. These cleaners work well on ceramic... Read More

The best cleaner to use for removing grout residue from a granite floor is sulfamic acid. Sulfamic acid is sold as a grout cleaner and works well on granite surfaces. Do not use on marble or limestone since the acid will etch these surfaces. Sulfamic... Read More

There are several treatments that can be applied to give the granite more slip resistance or you can apply an slip resistance acrylic coating. Slip resistance treatments contain hydrofluoric acid which etches the surface of the stone. The treatment... Read More

Polyester resins breakdown in the presence of ultra violet(UV) light. For this reason polyesters should never be used outdoors. For outside repairs it is advisable to use an epoxy resin. Epoxy resins are generally more resistant to UV light. Check... Read More

There are several companies who promote a two step recrystallization process. The first step uses the standard recrystallization chemical and then is followed by an application of a second chemical containing waxes which places a higher shine on the... Read More

The recrystallization method has been a topic of great controversy since its introduction to the United States in the late sixties and early seventies. There are several people who feel this process is detrimental to the marble and there are those... Read More

Steam can be used effectively on stone surfaces but be careful if you use any chemicals such as alkalies. Rinse the surface throughly if using alkaline cleaners. TIP Another good method for removing caulking, tar or chewing gum from granite surfaces... Read More

No, slate does not polish very well. The only way to put any kind of shine on slate is to apply a coating. There are several brands of acrylic coatings designed for slate and other stone. Check with your local janitorial supply or one of the stone... Read More

I am assuming that you are talking about burnishing a floor in speeds of 1500 rpm and higher. This is a typical maintenance procedure for certain types of floor finishes and is also used on stone flooring. I have not seen any articles or research on... Read More