Dear Kristin:
You have a few options:
Joking aside, there's nothing on this little blue planet that could prevent etching on stones that are sensitive to pH active substances. Just about every chemist in the world has approached this problem for at least the past 150 years.
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,
Maurizio Bertoli
Article ID: 1053
Created On: Wed, Jan 16, 2008 at 11:43 PM
Last Updated On: Wed, Jan 16, 2008 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=1053