Q. How can I remove white stains from rubbing alcohol dripping on my saltillo tile? The tile is sealed but the sealant probably needs to be redone. A. The alcohol has removed the existing sealer. The best thing to do is to strip the existing... Read More

Q. How can I remove drip stains caused by hydrochloride acid that was mixed 10:1 with water?? I was washing the walls and only left the acid mix on for no longer than 5 mins but the lower tiles have drip lines on them. A. What is the tile is... 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

In other words how can I grow algae and molds on the new wall? For this question I contacted a bryolgist at a major university. Bryologly is the study of molds and fungus. He gave me the following formula. Prepare the following mixture and paint it... Read More

Q: Our home is custom and less than a year old. We purchased St Lorent (sp?) black/red veined marble...expensive and lovely. We clean it twice weekly and wash off interior daily with water. It has dull streaks (like water falling down) on the... Read More

Q. One of our AC repair techs accidentally dripped an oil called PVE (polyvinylether) on a client's natural stone. The stone was already there when the clients bought the home, so they aren't sure what kind of stone it is, but we can tell... Read More

Q. The installer of my granite countertop used a color enhancing and impregnating sealer.  I wish he would have asked if I wanted the deepened color. Is there any way to return the granite to the original color and then reseal with non enhancing... Read More

Q. How do I create a poultice to remove stains? I know that to remove stains from my granite countertops that I need to make a poultice, but how do I do it?A. Here is how you do it:First, understand what a poultice is. It is simply a chemical or... Read More

The spotting can be caused by dripping toilet bowl cleaners, which can etch the marble surface. As of this writing there are no sealers that will prevent acid etching. I would suggest purchasing a non-acidic bathroom bowl cleaner, available at most... Read More

Applying an Impregnator to a Wall or Vertical Surface It can be challenging to apply an impregnator to a natural stone wall or vertical surface, because gravity causes the product to drip and dribble before it has time to be absorbed. It is no... Read More