Dear Judy:
Probably a stone color-enhancer was applied to your countertop, which was the right thing to do. It is strange that it was damaged by bleach, though. Probably is not the best of the color-enhancers available.
That said, you have to take care of those bleach marks by applying some more of the same product. (Changing brand may not be a good idea, for there could be a compatibility problem between the two products.) After that, for routine maintenance, first you read the free article about using dish soap to clean stone surfaces that you can find by logging on at:
http://www.mbstone.com/HH_promo/helpful_hints.htm.
After that, I recommend you to use a good spray cleaner for stone like MB-5. That's all you'll ever need.
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: 820
Created On: Sat, Nov 24, 2007 at 3:09 PM
Last Updated On: Sat, Nov 24, 2007 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=820