PLAID:DELTA-Martha Stewart Glass Etching Cream. Create professional- quality etching with this glass etching cream. Easy to use cream that is brushed on and rinsed off with water to create a permanent etch. Works great on glassware, mirrors and glazed ceramics. Does not work on plastic. This package contains 5.96 ounces of glass etching cream and one 3-1/2 inch brush. Please read precautions on package before use.