Nail polish originated in China, and its use dates back to 3000 BC. Around 600 BC, during the Zhou dynasty, the royal house preferred the colors gold and silver. However, red and black eventually replaced these metallic colors as royal favorites. During the Ming dynasty, nail polish was often made from a mixture that included beeswax, egg whites, gelatin, vegetable dyes, and gum Arabic. In Egypt, the lower classes wore pale colors, whereas high society painted their nails red
Shellac resist- http://ceramicartsdaily.org. I have done this more simply with grades 4-6. Make vessel with red clay and paint with white slip. Paint on shellac as resist. Let dry and gently remove the exposed slip with a soft sponge and water. White design on red clay.