Your steel porch railings are under attack from rust every hour of every day, but you can rescue them.

Use a wire brush or wire wheel on a drill to get down to bare metal. Be sure to get it all.

Rust in tight corners can be dissolved with a thick coat of chemical rust remover. Let it sit for half an hour, then rinse well.

Once the rust is gone, paint the railings with a zinc oxide or red oxide metal primer. This will discourage future rust attacks. Finish the job with a coat of good high-gloss, oil-base enamel paint.