It transforms the existing rust into a black protective barrier, which can give metal objects a fresh coat of paint. And will provide up to more than twice as much rust protection.
This rust treatment partly prevents future rust and corrosion by isolating moisture from rain and snow.
Wipe the dust and water stains clean off the metal surface, apply rust remover with a brush (included), and wait for it to dry. Quickly form a protective film, prevent rust repeatedly. No more scraping, sandblasting, or grinding!