Restore shine to coins and jewelry
Coins and jewelry that have started to gather at the same time.
pocket change is, simply drop the grimy coins into a Coke bath and leave them overnight. In the morning, pour the Coke down the drain, rinse the coins in warm water and pat them dry.
I grabbed a handful of grimy pennies and nickels, dropped them into a cup of cola and let them sit overnight. The black tarnish was removed from virtually every penny. However they did not require polishing with a wash cloth.
It's wise to be cautious when trying this on jewelry, as the acid in Coke can also be strip paint and rust off metal if left long enough. Remove the jewelry and promptly rinse. For something a bit safer,