Using this Rust - Oleum® Stops Rust® Hammered paint is easy. First, make sure the surface of the metal is clean. You can apply the paint directly over rust on things like wheelbarrows, lighting fixtures, and wheel rims. Whether you're using it indoors or outdoors, remember to apply 2 coats for the best results. Keep in mind that it has a gloss finish, which can make your metal items look shiny and new. As for maintenance, since it's durable and corrosion - resistant, it should last a long time. But if you notice any signs of wear over time, you can always add another coat to keep it looking great.