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The streaking may be caused by any one of a number of problems. The mop you are using may be dirty. Use a clean string mop and make a point of only using it for the marble floor. Wring the mop out several times as you clean the floor. Are you using... Read More

Diamonds and bricks both work well on granite but the final results will depend on the skill of the operator. Generally bricks require the use of an Italian grinding machine and a much higher degree of skill than diamonds. Diamonds are much easier to... Read More

The use of a pressure washer on marble should be avoided. Pressure washing forces water into the pores of the stone and can cause the development of efflorescence. If you must use a pressure washer make sure that the operator is skilled. Do not use a... Read More

This is a common problem with black marbles. How often are you using the recrystallization process? I have seen this problem when recrystallization is over applied and performed too often. At this point the floor may need to be re-honed. An... Read More

Q. I was reading your Stain Management Application about cleaning vinegar stains, and in the types of stains on the left, vinegar is not listed. I was hoping you could clarify what poultice and method to use. Vinegar diluted with water was... Read More

Q. Some lime juice got spilled on my Bluestone table top and it left a big dull spot. Is there anything I can do to bring back the shine?   A. Maybe. If the etch is severe (deep to the point that it looks and feels rough), then you will need to... Read More

Q. The resin coating of our Knoll Saarinen marble top table has been cracking and peeling for the past year. We don't know what to do. Any advice?   A. Some manufacturers use resins to create a topical polish, which look amazing... at first.... Read More

Q: My 6 month old shower has a travertine shower pan and a combination of ceramic and travertine tile on the walls. There are hard water marks all over the tile and on the fixtures and I need to get them off. I have already tried some of the... Read More

Q. I applied a sealer twice, but the stone still darkens when it gets wet. Should I seal it again? A. If your stone still darkens when your pour water onto it (rather than just beading up), then it should have another application of sealer. SomeÂ... Read More

Q. Can I remove etching from my stone? A. Maybe. If it is polished marble or travertine or onyx, then there’s hope. If it is hone-finished marble or travertine, or hone-finished slate (like a chalk-board), or mixed "granite" then you’d... Read More