Remove any flaking old paint off the gate with a scraper. Place newspaper beneath the gate to catch the paint flakes as they fall.
Wash the gate with a degreasing solution if necessary. Usually, a sponge with soap and water is sufficient to clean the gate prior to sanding.
Sand the metal surface using coarse-grade sandpaper. Coarse sandpaper not only removes old paint but also scores the metal, which improves the adherence of the new paint.
Wipe the gate with a slightly dampened clean cloth. The damp cloth will pick up any residual dust created by sanding. Follow up with a dry cloth.
Apply a coat of primer to the gate. Primer provides extra protection against rust and bonds well with rust-resistant paint.
Apply a thin first coat of rust-resistant paint to the gate using a soft bristle paint brush. Keep the newspaper under the gate to catch any paint drips. Allow the paint to dry according to the manufacturer’s recommendations.
Apply a second coat of paint to the gate. Two coats of rust-resistant paint along with a coat of primer will protect the gate for years.