 Say you want to brighten up some tarnished copper. Coat the copper piece with ketchup and let it sit for about 45 minutes. When you wipe it clean, the ketchup will have removed the tarnish. Just don't forget to rinse it off. So the next time you want to serve pork on a copper plate, be sure to pull out the ketchup. And if the apple brandy demi-glaze is too tart, then the ketchup will come in handy for that meal too. Ketchup. It's just not for dinner anymore.