These flexible, multi-use stenciils easily adhere to various shaped object allowing you to cream etch, sand etch, or paint on glass, mirror, ceramics and other non-porus surfaces to create beautiful designs. Simply remove the stencil from carrier sheet, apply and etch glass, wash the stencil with warm water and return to carrier sheet. The reusable lettering and numbers can last as long as the self stick when using cream and 15-20 times for light sandblasting (we recommend abrasive between 180-220 grit size preferably 220).