Eastwood is just a supply house, they don't manufacture. I've used POR 15, it's good stuff. They recommend using their prep cleaner, and a rough surface rather than power wire brushed. I recently used a Rustoleum spray can
paint on an outside railing, fast drying. Worked good, but don't remember the exact name. With POR 15 figure on throwing away the brush, don't get it on you, and use a plastic bag under the lid when sealing the can.