Did you know there is an easy solution to restoring your brass and copper treasures without burning your fingers or inhaling noxious fumes? Believe it or not, it’s likely already in your kitchen cabinets. It’s ketchup. The acidity of ketchup makes it one of the best homemade polishing agents for metals. All you need is some ketchup and a brush or a cloth. Watch this video to learn how to use ketchup to remove the tarnish from brass and copper.