I should leave all the details to the experts but I do want to > mention before you consider cleaning any stone that you first make very sure > that it is safely and prominently secure in its position before you attempt > any exercise in cleaning. You do have to make sure the stone is not fragile. Putting pressure to clean it with a brush on a weak or leaning stone may damage it further. Also run your hand across the stone, if you feel something like sugar granules come away on your hand then the stone is sugaring and you shouldn't clean it. It's likely we'll be recording the demonstrations by Charles Thomas, I'll post them on our website http://www.chiltoncemeteries.org and let y'all know about here if you like. Katherine PS... I'm in Clanton now ... but descended from the Phillips and Goodwin families. My family cemetery is the Phillips Cemetery in Empire. My grandmother (who is still with us) is the granddaughter of Martin Marion Phillips.