Remove rubber tips and cushions (if there are any).
Wash furniture with a mild detergent (you'll probably need some rags or a scrub brush) and rinse.
Use a wire brush to scrape off rust and loose paint flakes.
Look carefully: if paint has bubbled (a sign of rust underneath) use a screwdriver or chisel to break the bubble and chip away the bubbled paint, and then scrape with a wire brush.
Remove rust with commercial rust remover.
Paint or spray with rust-resistant paint. If the furniture is very corroded, you may want to prime first with rust-resistant primer.
Let dry. Plan on 12 to 24 hours for each coat, depending on weather and temperature.
Replace any rubber tips and cushions.
No