What would a monument dealer know about the chemical weathering processes and the chromatographic properties of shaving cream? They have no training in either organic chemistry or geology, so how are they experts? This is like asking Einstein who is going to win the super bowl. He is an expert, unfortunately not on football, though. Monuments dealers may be experts, but not on anything having to do with the effects of shaving cream on tombstones. Let's leave those issues to people who are actually trained in the field that is relevant - the people who publish papers on chemical weathering in the Journal of Chemical Geology, and the like. They are the experts, and when they talk, they are talking from expertise, not opinion. Brock Way __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail