Can you paint corten steel?

Short answer: Yes! In fact, shipping containers are made of corten steel, and then painted in a variety of colors. This means that even if the paint flakes off, the steel is not dependent on it for a protective coating, and will not erode.

How to Paint Corten Steel

1. Prepare the Surface: Begin by thoroughly cleaning the Corten steel to remove any dirt, debris, or loose rust. You can use wire brushes, sandblasting, or chemical cleaners to get the surface smooth and clean for painting. Make sure it’s completely dry before moving on.
2. Priming: Apply a metal primer that stops rust and helps the paint stick. Use a brush, roller, or spray gun to cover the surface evenly. Follow the instructions on the primer for how many coats to apply and how long to let it dry.
3. Topcoat Application: Once the primer is fully dry, apply your topcoat paint. Choose a durable paint made for metal, like acrylic or polyurethane-based options, which hold up well to weather. Apply thin, even coats with a spray gun, brush, or roller for smooth coverage.
4. Painting Techniques: The painting method depends on the size of the surface and the finish you want. Spraying works best for large areas, while brushes or rollers are good for smaller spaces or details. Try different methods to get the finish you like.
5. Maintenance: To keep the painted steel looking good, check it regularly for any chips, wear, or rust. Touch up damaged areas to prevent rust from spreading. Follow the manufacturer’s recommendations for maintaining and reapplying paint as needed.