Oxide Removal
Oxide removal: When bisque ware is decorated with oxides a mistake can mean considerable mess and delay. If you use a wet sponge to clean the pot the oxide may become smeared, difficult to remove, and the pot must be allowed to dry before decorating can resume. Try using a pencil eraser - it efficiently removes oxides without wetting the pot and can remove precise spots.
Courtesy COLLECTED WISDOM | 50 years of handy hints from the Ceramic Study Group, Australia