Aluminum Black is now in an easy to use pen applicator. Aluminum Black r estores scratched and marred area of blackened finish on your aluminum alloy firearms quickly and easily. Fast-acting liquid is easy to apply with no dimensional change. Aluminum Black is also excellent for blackening name plates, plaques, trophies and other engraved items. Easy to use, store, and apply with this new pen style applicator. Compact size Felt tip pen Excellent for blackening name plates, plaques, trophies, and other engraved items