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A common problem with limestones and some marble buildings is that they get a brownish yellow hue after cleaning. Most of the time we find that there is a high content of iron in the water used to clean the stone. Use a chelating agent in the wash... Read More

There are several methods that can be used to remove spray paint from granite. Time is of the essence, the quicker you can remove the paint the less likely it will penetrate deeply into the stone. If the stone is polished, try scraping the paint... Read More

Be sure to cover your poultice with plastic in the case of rain. You may find that the poultice may dry too rapidly outdoors. Try covering with your poultice plastic with a layer of black plastic to block the sun light. TIP To prevent rain from... Read More

First of all, don’t waste too much time in applying poultices to large areas if it would be easier and cheaper to replace the material. Here are some suggestions for applying poultices to large areas: Use multiple poultices and work in... Read More

This is a very common problem on granite. Granite is a very porous stone, more porous than most marble. Because of its porous nature, granite has the ability to retain a great deal of moisture. The dark area in this case may simply be excessive... Read More

The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the country. There are several possible causes for this condition: Maintenance technique-Take a close look at your maintenance program. Are... Read More

Yes and no. A vacuum cleaner can be an excellent tool for eliminating dust and dirt, but you must be sure that it will not scratch the marble. Check the bottom of the vac and make sure there will be no metal rubbing on the stone as you move it back... Read More

First you need to determine why you want it waxed. Do you want to add shine, or is your intention to protect it? If protection is your main concern, I would recommend applying a silicone impregnator over a wax. If you want to increase the shine, you... Read More

Unfortunately, most polyurethane finishes require strong solvent-based chemicals for removal. Methylene-chloride strippers as well as a number of safe strippers are available, but be forewarned: removing polyurethane is a messy job. I know several... Read More

Removal of rust on terrazzo will typically require both a powder poultice and a commercially available rust remover. Iron-Out mixed with a plain poultice powder works well. You may also want to try using the Iron-Out alone, mixing it into a paste and... Read More