How To Paint Metal Chairs. Sand the metal surface to remove any rough spots. Holding the can of primer 6 8 inches from the surface begin priming the chairs using a sweeping side to side motion with slight overlap.

Let the primer dry overnight. Use a back and forth motion following the natural lines of the chair. So before painting i scuffed the frame with my oscillating tool so the paint would adhere better.
Make sure that the chair is 100 percent dry before moving on to step four.
Hold the can of primer 6 inches 15 cm from the chair and press the trigger to apply it. Prime with a high quality rust preventive spray primer. Use the spray primer paint to cover the entire metal chair. Spray slowly for a consistent spray pattern to avoid drips and overspray.