The better method would be not to clean the coin at all. Except under certain very specific circumstances by professionals who know what they're doing, cleaning almost always significantly reduces the value of a coin.
When a penny is new, it's bright and shiny, but like most other metals, after oxidization (exposure to oxygen) or in the presence of moisture or salts, it can be covered by a dull oxide coat....
DO NOT try to clean coins. Any home chemicals will damage the surface. If the coin had any collector value before cleaning, it will be worth only 1 cent afterwards. If you want to experiment with...
I would either try pouring just enough vinegar to cover the pennies in a glass, place the pennies in the glass of vinegar, and then place the glass in hot but not boiling water or try rubbing the...
If you leave a penny in a jar of coca- cola it will clean it shine it up pretty good. I tried this with a really old penny and left it there for a week it looked like new
Related ads:
Shopping for Coins and Paper Money deals?
Find Coupons and Promo Codes on Coupons by Answers.com