Just wondering if there is anyone out there who has used this technique and on what types of surfaces. Thanks Charlene Vollrath Health Physics Consultancy Manager Monserco Limited T: 905.450.3507 .232 F: 905.450.8523 C: 416.571.2104 E: <mailto:charlene.vollrath at monserco.com> charlene.vollrath at monserco.com