SCE-1 Electrolyte&nbsp;Fluid for Electro-Chemical Etching - 16 fl. oz. Intended for use with the Personalizer electro-chem etching machine and fluids SCE-1 is designed for etching/marking on aluminum, stainless and mild steels, stellite, high alloy and tool steel, and Monel metals 16 fluid ounce bottle sealed with tape during shipping Product has a 2 year shelf life