Sanford China Marker Grease Pencil - Peel-Off Sharpie WHITE 2 Pack Sharpie's PeelOff China Marker (also known as a grease pencil) features a thick, waxy core that marks on any surface  china, glass, metal, plastic, photographs, films, and more. To reveal more of the core, simply pull the string and peel away the paper. Also available in yellow, black and red