I used a Shop-Vac with a custom attachment to (very gingerly) clean a shell midden exhibit in a historical, archaeological & environmental park in Florida. It worked surprisingly well. You can view some photos of the project here: http://archaeologyfieldwork.com/cgi-bin/yabb/YaBB.cgi?board=photo;action=display;num=1029893007 Jennifer Palmer Webmaster, archaeologyfieldwork.com http://www.archaeologyfieldwork.com _________________________________________________________________ Our best dial-up offer is back. Get MSN Dial-up Internet Service for 6 months @ $9.95/month now! http://join.msn.com/?page=dept/dialup