Dear Steve:
Your stone merchant is correct. However, if the lighter squares match the color of the darker one when wet, you should be able to bring them up to par permanently with the application of MB-6 stone color enhancer. Just apply it on only one square at a time and then, immediately, rub, rub, rub, rub, with a clean rag or Bounty paper-towel, until the stone becomes darker and every residue of the product is removed from the surface. Do the next square, and so on.
After that, you will learn out to take proper care of your stone with MB-5!... :-)
May I ask you now to please read and e-sign our Statement of Purpose at:
http://www.marblecleaning.org/purpose.htm?
:-)
Ciao and good luck,
Mauri
Article ID: 120
Created On: Tue, Jun 19, 2007 at 9:21 AM
Last Updated On: Tue, Jun 19, 2007 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=120