Do I need to prime before using Rust-Oleum paint?

Whether you need to prime before using Rust-Oleum paint depends on surface type, condition, and which Rust-Oleum product you are using, but in many cases Rust-Oleum includes primer in formula and priming may not be required, though priming improves results. For Rust-Oleum Painter's Touch 2X spray paint, which is labeled paint and primer in one, you do not need separate primer for most previously painted or bare wood, metal, and plastic surfaces if surface is clean and lightly sanded, as it has good adhesion. For bare metal that is rusty, you should use Rust-Oleum Rusty Metal Primer or Rust-Oleum Rust Reformer first to convert rust and prevent bleed-through, then topcoat with Rust-Oleum Stops Rust. For heavily rusted metal, priming is essential to stop rust from returning. For bare wood that is knotty or stained, priming with Zinsser Bulls Eye 1-2-3 or Cover Stain prevents tannin bleed and improves adhesion. For glossy surfaces, light sanding plus primer improves adhesion, though Painter's Touch 2X sticks well. For new drywall, primer is recommended before Rust-Oleum wall paint. For automotive and high-performance coatings, primer is recommended. So while many Rust-Oleum paints say no primer needed, best practice is prime bare, rusty, or stained surfaces for longest durability, and you can skip primer for previously painted clean surfaces in good condition.