Abstract: A stencil system and process for applying a decorative coating atop a substrate surface. The stencil system includes a plurality of stencils connectable in an array used in the process and structured to lay interconnected atop the substrate without relative movement and to uniformly and completely shield a decorative or geometric pattern defined on the substrate from being coated by the array of stencils. Thus, a liquid cement-like coating, preferably sprayed over the substrate to a thickness generally equal to that of the stencils, will cure and harden after removal of the stencils, to create a decorative simulated stone, brick, tile or the like surface appearance.