Abstract: An apparatus and method used for stenciling selected indicia upon and into surfaces of structures for identification purposes, the apparatus comprising a hollow body with air pressure release outlet means, an aperture in the body wherein a detachable stencil holding unit having a stencil receptacle for affixing desired unit stencils over said aperture and a unit for applying the stenciling medium from within said body to said indicia; and a method of automobile identification marking wherein stenciled markings are placed on the panes of glass of a vehicle, the markings on each vehicle being unique and stored with other information in a central depository, the information being retrievable.