These pigments are designed to replicate the look of polished metal by gently rubbing the pigments, bringing out a metallic shine. This is especially useful for cannons, barrels, exhaust pipes and other tubes.
They can be applied over any surface, preferably black matt, and should be rubbed gently with cotton, a brush or your fingertip. A small quantity of Master Medium can be mixed to act as a fixer to avoid the pigments from coming off if touched. However, applying pigment fixers or varnish afterwards could alter the final effect.