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

There are several methods that can be used to remove spray paint from granite. Time is of the essence, the quicker you can remove the paint the less likely it will penetrate deeply into the stone. If the stone is polished, try scraping the paint... Read More

  Q. I have a shower floor that has small stones of different colors and it is yellowing in 3 places. This started right after it was installed. Someone told me it was iron in water. How do I get rid of the yellowing? It's in the grout and on... Read More

Q. Hi. I watched your youtube video and need advice. I spilled sea salt hair spray on my marble counter and it left a stain. I believe that it is an oil stain. What kind of poultice should I create to remove the stain? A. Natural stone is porous,... Read More

Q. I accidentally left a candle on my wood burner, lit a fire and the wax melted. The candle was on a saucer which collected most of the wax. When I moved the candle and placed it on the hearth, I spilt the wax. After it had cooled down I lifted the... Read More

Q. I am making some improvements to an 87 yr old building with limestone floors. There are some copper stains on the limestone, caused by some moisture and the copper lights bleeding. Please tell me how to clean up this stain. A. Use a soft brush... Read More

Q. I would like information on how to remove water etches (?) spots that are not smooth when I run my finger over the spot. It is a honed finish and the spots are more like water spots. There is no colored stain, it is more like dull spots scattered... Read More

Q. I believe I have spill marks of vinegar and also some cleaning solution that stained my marble and limestone floors. I need help in which poultice to use.   A. Marble and limestone are calcium-based stones, which means they are sensitive to acids... Read More

Q. My pickling vinegar bottle (7 percent acidic) leaked on my flagstone (limestone?) floor. I made a paste of baking soda and applied after washing the floor with Marbalex stone floor cleaner. I let the paste sit for the afternoon to no avail. I... Read More

Q. How do I remove a candle wax stain on bluestone? A. Here are the full instructions for candle wax stains: To remove candle wax that melted into the pores of the stone: Use a hot clothing iron (preferably one you don’t mind getting wax on)... Read More