Barry:
My guess is that on one of the levels, you did not go far enough. You may have to work the diamonds more than you did. Also, the 5x may not be hot enough. Eastern Marble has Italian Craftsman which may help. Hope this helps

On Sat, Aug 7, 2010 at 11:37 AM, Barry Raduta <barry@diamondstoneandtilecare.com> wrote:
hi folks,
i am one week into the process of restoring black marble in a public men's restroom.  the walls were very badly etched from harsh cleaners around the urinals and the toilets.  they were actually gray and off white in color.  the upper walls were badly etched from cleaners splashing on them over 13 years.  here's what i did.  i used a hand machine and honed with 120, 220, 400, 800, and 1800 diamonds.  in some areas i began with 50 diamonds on the bottom tiles because they were so bad.  . all of the bad etching was honed off and i felt good about the job up until i did a couple of test areas with 5x to see the end result.  the marble got shiny but it looked "translucent" and even "cloudy".  i recently did a black marble floor in a kitchen and i could "see through the stone" when i finished but that did not happen with this stone..  i followed all the rules and what i was taught on the restroom walls but it doesn't look the way it should. 
i have not showed the customer the test spot yet.  is there anything else i can do?  i am on a time deadline and cannot redo the one wall that i took to 1800, but i can rescue the other walls because one is only up to 400 and the other only 220.  before i began the stone was not really very clear and bright, so maybe it will never meet my expectations.  any ideas what i should tell the customer if the rest of the job yields the same results that my test area looks like?
thanks........barry
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Thank You,
Barry V Raduta
Diamond Stone & Tile Care
215-816-7689

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Sincerely:

Don Semi
www.srsdenver.com
srsdenver@gmail.com
303-249-7909