Each stencil can be reused between 15-20 times depending on the amount of pressure, care of use, distance between the tip of the blasting gun and the stencil, and the type of abrasive (we recommend between 180-220 grit size preferably 220). Oh, by the way. . . did we mention that you can also use these stencils with our Armour Etch glass etching cream, water based paints and even body paints