This wonderful product will make many of your painting projects easier. It's the perfect solution when removing rust is too difficult or not absolutely necessary before painting. Great for painting projects like the underside of vehicles, farm implements, construction equipment, wrought iron railings and more. This product is specially formulated to simply be painted on over rust. Just knock off any loose rust, apply with a brush, roller or sprayer and you're done. The barrier blocks oxygen and water from re-attacking the surface, so the rust is stabilized and stopped. It can then be top coated with latex, epoxy, enamel, polyurethane and acrylic paints. You may apply it horizontally, vertically or upside down. A real time saver! The one quart can covers 50 to 90 square feet.