Birchwood Casey Aluminum Black Touch-Up (946 ml / 32 oz)

A room-temperature blackening liquid used by gunsmiths to refinish aluminium parts and restore scratched or marred areas. It is fast acting and causes no dimensional change. The finish ranges from deep grey to black depending on the alloy, and a clear coat, wax or oil improves the final look. This is the 946 ml (32 oz) bulk bottle.