How to Clean Copper Coins in Seconds (with pictures) - wikiHow Wow! Did it for the pennies in our outdoor fountain. To keep our fountain cleaner longer throw in pennies dated before the year It totally works!
Cleaning Copper with Ketchup (Video)
How to Clean Copper with Ketchup | Cleaning Copper with Ketchup | Remove Tarnish from Copper | Keep Copper Shiny