Do I need to prime metal before painting with Rust-Oleum?

Whether you need to prime metal before painting with Rust-Oleum depends on type of metal, its condition, and which Rust-Oleum product you are using, but generally priming is recommended for best durability though some Rust-Oleum products are paint and primer in one. For bare clean steel or lightly rusted metal, Rust-Oleum offers Rusty Metal Primer that should be applied first before topcoat for maximum rust prevention and adhesion, especially outdoors where moisture exposure is high, as primer contains extra corrosion inhibitors. For bare aluminum or galvanized metal, you need special primer like Rust-Oleum Self Etching Primer or Galvanized Metal Primer because regular paint does not adhere well. For previously painted metal in good condition with no rust, you can often scuff sand and paint directly with Rust-Oleum Protective Enamel without separate primer if using paint and primer in one formula, though primer still improves adhesion. For heavily rusted metal, use Rust Reformer as primer first. Many Rust-Oleum spray paints like Painter's Touch 2X Paint and Primer claim no primer needed for light use, but for outdoor gates, fences, and automotive parts, separate primer extends life from 2 years to 5 to 10 years. Skipping primer saves time but may cause peeling sooner, especially if water from overflowing gutters constantly wets metal. So for best long-term protection, prime first, then topcoat with two coats.