What causes spots and ring shaped marks on marble?
Q. I have a marble table top with a problem, and I need to get some advice on what may have caused it. There are lots of spots plus a few ring shaped marks. The marks cannot be cleaned off. The table was delivered in pristine condition. Is it possibl... Read More
Should tile discolored by vinegar be resealed?
Q. I used vinegar to clean my shower tile. It is textured marble mesh mounted black and white mosaic tile. I didn't know I shouldn't use vinegar. Now they are discolored. Do I just need to re-seal it? Thank you! A. The acid in the ... Read More
Efflorescence - Removal and Prevention
Efflorescence - Removal and Prevention By Frederick M. Hueston www.stoneforensics.com The crystallization of soluble salts in Historic masonry causes severe deterioration of the substrate. This crystallization is called subfl... Read More