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Q. Our limestone fountain is dyed on special occasions. The purple dye is penetrating the limestone at the bottom of the wall. How can the purple dye be removed from the limestone? I have tried acid and chlorine. Any suggestions?   A. Thank you... 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. How would I remove a WD40 stain from an unsealed limestone hearth? A.  To remove WD-40 from unsealed limestone, we recommend the poultice method of stain removal. Mix a good degreaser, which can be purchased at Home Depot or Lowe’s,... Read More

Q. How do get the stain from furniture polish to come up? We used Scott’s liquid gold and accidentally ended up with a ring on the limestone hearth. A. These type of stains can be difficult to remove. You will need to use a poultice with a... 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. 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. We had a new lueders limestone fireplace surround installed. There are darker stripes on each side of all grout lines. Installer said grout was not acrylic, but grout did have some colorant. Stone has dried now three weeks and stains still present... Read More

Q. We have mold buildup in grout joints and surface has film on it. What is best to clean mold and remove film from surface?   A. There are several cleaners that will remove the mold but you must be careful to choose one that will not damage the... Read More

Q. I bought lagos azul limestone back in December and it is getting installed in sections. I would greatly appreciate it if you could help me. I am hoping you might know a solution or can refer me to someone. My kitchen contractor installed the tile... Read More

Q. I accidentally wiped my limestone fire surround on one side with a cloth that had WD-40. It has discolored  the limestone that is stone in color. The discolored area is a few shades darker. How can I bring it back to the lighter color it should... Read More