The room temperature chemical used by gunsmiths and industry to blacken aluminum parts. Restores scratched and marred areas quickly. Fast-acting liquid is easy to apply with no dimensional change. Color will vary from deep gray to black depending on alloy. Key Features Fast-acting liquid used to blacken or antique brass, copper and bronze parts Easy to apply with no dimensional change. Often used to mark cartridge cases to identify loads Final appearance is enhanced by applying a clear coat finish, wax or oil
