Please contact a conservator who specializes in building conservation. There are commercial firms that clean marble in building structures using several different methods, some harsher than others. A qualified conservator can advise on the best method to use for your particular building. A list of conservators and guideline for selecting conservators can be found at the American Institute for Conservation web site http://aic.stanford.edu . Click on the "selecting a conservator" button. You can find conservators by specialty area, and location, anywhere in the US. And in light of the "hosing down David" discussion, please don't. Marble sculptures are not indestructible, and there are safe and unsafe ways to clean them. Contact a sculpture conservator for advice. Richard L. Kerschner Director of Preservation and Conservation Shelburne Museum PO Box 10 Shelburne, VT. 05482 Hi, I am the Assistant Administrator for the Lowell Historic Board (architectural review board) in Lowell, Massachusetts. A staff person from the Planning Department of the city approached us about appropriate ways to clean marble. (City Hall has a couple of large sections of marble incorporated into the wall.) I told them I would contact the list and see if you all had any experience/ideas for us. (Especially in light of the discussion I briefly saw about cleaning David.) Thanks in advance! Jillian Adams ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).