It has many uses! It is used as a filler for primer/ paint in preparing surfaces for painting. It is used in traditional artistic painting, lime painting and plaster. Whiting Powder is also used as a pigment filler to increase the coverage of paints, coating and whitewash. It is also used with rabbit skin glue for making traditional Gesso. It is used as a filler with glue, in engraving to wipe off excess ink, cleaning of abrasive for metals (like silverware), as a filler in the manufacture of paper, and with water for designs on glass. Even more uses for this product can be seen here. Whiting Powder is a very fine white, 100% natural powder that is slightly abrasive and composed mainly of calcium carbonate and less than 1% of quartz. How to use for cleaning Mix a small amount of the powder with water to create a paste. Rub the paste against metals and precious stones to polish them. Index Colour: PW18 Constitution Number: 77220 Chemical Formula: CaCO3 Composition: 99% Calcium Carbonate and less than 1% of quartz