Wire Wool Double Zero (00) Grade. LARGE 450g PACK! Partcularly useful for use with resins when cold casting using metal powders. By constant gentle rubbing, the upper coats of the resin are removed to reveal the metal powder held in place by the resin. This then simulates the look of a cast metal with a brushed finish. The piece can be polished after with a standard metal polish to bring out more shine.