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The marble has probably been scratched by the underside of the door. First, trim the door bottom so that it does not scrape on the marble. Then have the dull spot refinished and polished. You will probably need to start with a course abrasive(60#).... Read More

You may want to recommend to your customer that having the edges rounded would help prevent further chipping. The edge can be rounded using a course diamond abrasive on a small electric hand machine. You can also put a profile on the edge using a... Read More

It all depends on several factors. Generally, granite will take much longer to grind, hone and polish then softer materials like marble. As a rule of thumb you can plan on spending about one minute per square foot per grit. If your using a system... Read More

Of course you can use an oscillating sander but an oscillating sander tends to leave a stray scratch pattern that can be difficult to remove. I have found the best method is to use a rotary polisher for best results. TIP If the top is large enough... Read More

There are now available many course abrasives that can grind a marble floor flat in a hurry. These abrasives are called lippage plates. They work exceptionally well. Be sure to test in small area before grinding the entire floor. Some of these plates... Read More

There are several reasons you may be getting stray scratching check the following: Do the grout joints contain sanded grout? If the grout joint is wider than 1/4 inch, the chances are you have sanded grout. If you do, then the grout is becoming... Read More

This is a common problem with many of the marble polishing powders because they all contain oxalic acid. Acids of course will etch marble. To prevent etching you need to wet the areas you are not working on with water and the addition of either a... Read More

Q. How do we clean white spots from bird droppings on colored concrete? We have a church under construction with tiles on the floor. Windows hadn't been put in yet, and birds came in. The tiles are left stained white from the droppings.Â... Read More

Q. I have yellow staining on my marble around my sink. I believe it's from the water sitting around the edge of the sink. Do you have a product you'd recommend to remove the yellow? I can't feel it like an etched stain. Would the... Read More

Q. I bought an onyx marble pen and pencil set that had an engraving plaque on it. I removed it and of course dulled the shine when trying to clean the glue off. Any way to restore this to new? It is an old Scheaffer marble desk set. The slab is about... Read More