Scrub any rust or flaking paint on the metal lawn furniture with a stiff wire brush and soapy water.
Rinse the metal lawn furniture with a garden hose and dry the furniture with a clean towel.
Spray a layer of rust resistant metal primer on the clean lawn furniture. This will prevent rust and stop any existing rust from spreading.
Apply a thin coat of spray paint in the chosen color to the metal lawn furniture. Allow the furniture to dry completely. Apply a second coat and let it dry. If needed, spray on a third coat and allow it to dry.
Sand the dry metal lawn furniture with 200-grit wet/dry sandpaper and water. Keep the sandpaper and the lawn furniture wet while you work to achieve a smooth, shiny finish.
Dry the metal lawn furniture with a clean towel after sanding.