Birchwood Casey® Aluminum BlackTM Metal Finish. Use what the gunsmiths use 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. Also excellent for blackening name plates, plaques, trophies and other engraved items. 3 or 32 fl. ozs.