Naval Jelly for Removing Rust

This tip is from many years ago, use Naval jelly. Hardware stores have it. Read the bottle well, know what you are using, and if it's appropriate. This requires ventilation, use it weather permitting. Turn on the exhaust fan, open windows and close the door while it does the job. Follow the directions.

Another old trick; Wrap or lay an old cloth on the stained area, let it soak with straight Coke overnight. Repeat as needed.