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Q: Hi. I have applied a poultice of DE and iron out to white marble to try to remove the iron. Where do you purchase a chelating agent that is to follow? A:  If the iron out works than a chealting agent would not be needed. ... Read More

Tips for Silicon Impregnator Application Proper silicon impregnator application is necessary for a variety of reasons. In this article, Fred Hueston, Chief Technical Director of Surface Care Pros and owner of Stone Forensics provides tips for silicon... Read More

Reusing a poultice powder for stain removal is not advisable, and here’s why. Fred Hueston, Chief Technical Director of Surface Care Pros and Owner of Stone Forensics explains, “I would not recommend the reuse of poultice powder.... Read More

Graffiti Removal Procedure for Stone, Masonry, and Tile Surfaces By Frederick M. Hueston, www.stoneforensics.com If your beautiful building, wall, or other surface has just become the unintended canvas for graffiti, your first reaction might be to... Read More

A common problem with limestones and some marble buildings is that they get a brownish yellow hue after cleaning. Most of the time we find that there is a high content of iron in the water used to clean the stone. Use a chelating agent in the wash... Read More

Distilled water should be used in poultices, because it does not contain minerals such as chlorine, iron, and others or contaminants that can reduce the effectiveness of the poultice. Poultices work by drawing staining agents out of a surface and... Read More

A neutral cleaner is a water based cleaner that contains surfactant (detergents) and wetting agents. They are called neutral because they have a pH of 7 which is neutral. It is beyond the scope of this book to explain pH but for further info on pH... Read More

Q. What is the best way to clean a white marble bathtub? What is the best way to keep it clean? What shampoos and soaps should be used by people in marble bathtubs?   A. The shampoos, soaps, and cleaners you use can damage, stain, or diminish the... Read More

Q. Discolored granite near sink. Darker near soap dispenser. It's obvious that we didn't seal it properly because it was perfect when it was installed 4 years ago. I tried doing couple DYI solutions to remove Paris of plaster w water... Read More

Q. We just recently had a white marble installed on our bathroom floor and just noticed the section that is getting no sun from our window (it is being blocked from our tub deck) is yellow. It does have a heating system installed under it. Do you... Read More