Metroark PA-56 is a paint additive specially designed to impart hammered effects to protective coatings. It is effective in very low concentration and hammered finishes are possible with many different types of coatings. The additive produces a hammer finish with baking enamels, airdrying enamels and lacqures when used with non-leafing aluminium pigments. Low concentrations of the additive produce coarse-appearing hammer finishes while higher concentrations produce a very fine hammer finish.