A method is provided for enhancing the results of an optical scan of the surface of an object such as human dentition in which the surface may be dry or wet. The method includes the step of applying a composition to the surface, wherein the composition includes a volatile component that rapidly evaporates resulting in the transformation of the residual composition to a durable, water insoluble, non sticky film on the surface, whether applied in a dry-field or in a wet-field environment. The composition generally includes an agent that improves the quality of the optical return signal to a 3D optical scanner. The method further includes the steps of scanning the surface having the film with an optical scanner and then, once scanning has been completed, using an organic solvent, such as a mouthwash containing alcohol, to remove the film from the object's surface.
