etchall etching crème is a re-usable etching crème that produces a white opaque, permanent etched surface on glass, mirror, ceramic, porcelain, marble and slate. etchall can be use on large areas like a shower door or on a small area like a name on a wine glass. Gives a matte smooth finish with clean sharp edges and "tooth" for painting, inking, rubber stamping, etc. The Art and Craft Material Institute has approved etchall etching creme to be used by children 12 years and older, children under 12 years can use etchall under the supervision of their parents. It conforms to ASTM-D4238.