Q. I have tried removing rust stains on these stone columns (on testing the base is limestone), and I believe the columns are the same? I've used a number of different branded products and oxalic acid but none of these have removed/lessened the... Read More

Q. My home is approximately 1 year old. And the main floor has porcelain tile. Over the past few months we noticed the grout changing color (darker) in only some spots throughout the home. The spots are about 1-1/" in length. Since we are still under... Read More

Q. I have a marble backsplash and there is grease from cooking in the grout. How do I get the grease out of the grout without ruining the marble? A. Marble is very sensitive to acids and abrasives, so the goal is to clean the grout without harming... Read More

Q. Yellow flower petals from Arizona trees recently stained my outdoor limestone tiles. Is there a way to remove this type of stain? The yellow does not blend well with my light grayish tiles. A. It's a shame something natural and harmless like... Read More

Q. My Pietra Cardosa countertops are darkening around the sink and other areas that are not covered for example around the toaster oven. I tried a paste that removes oil stains but it didn’t work. What do you suggest? A. There are several... Read More

Q. Grey grout stain has penetrated the surface of some of the ceramic wall tiles in our bathroom. It’s been a few weeks now, and I’ve tried scrubbing with water and a mild cleaner, but the stain is still there. Is it possible to remove... Read More

Q. We grouted our beautifully installed marble backsplash with a gray grout without sealing the marble first. Unfortunately, the marble—which was originally white has now turned grey. It seems the grout has discolored the surface. Is there... Read More

Q. Help! I have mysterious stains on my new marble patio pavers at our home in South Florida. Our stone was set in sand over concrete less than two weeks ago. We noticed red-brown stains after it rained. I’m frustrated because I can remove the... Read More

Q. How do you remove rust stains from a terrazzo floor? A. Rust stains, or iron oxidation, on terrazzo can be frustrating, and sometimes, surprisingly complicated to remove. While Iron-Out or similar products can be used in a poultice to draw out the... Read More

Q. How do I remove pet discolorations on my bluestone hearth that did not come clean with mild soap / water/ scrubbing? A. The answer to this question depends on what caused the discolorations. Bluestone can becomes discolored by pets in various ways... Read More