How To Clean Pennies Without Losing Value
Camila Farah

The best you can do is to place them in distilled water and then clean it with an old toothbrush.
When i first began collecting coins and wanted to learn how to clean them i learned that mixing baking soda and vinegar in a glass creates a highly potent solution that can strip away dirt and grime from coins. Place your pennies in the vinegar or the lemon juice. A non abrasive liquid solvent like distilled water and a weak soap will have enough cleaning power to clean your coins and does not contain acids that can corrode them. Try an acid product but only if you are sure of the coin type.
The simplest and least harsh method of cleaning your penny is to soak it in distilled water overnight rinse it the day after and air dry on soft cotton cloth. Clean each coin separately in this process. If you stil think you want to clean your ancient coin then soak in soapy distilled water but never use lemon juice or vinegar on bronze coinage. You should hold the coins by the edges while doing this.
First of all rinse the coins under running water. Put the coin in the bowl and slowly rub the coin with your finger from both sides. On how to clean pennies and dimes. Baking soda and vinegar great for science fair volcanoes but not for enhancing your coins value.
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Coins made of nickel and silver will be easily cleaned. Abrasive cleaning using a brush and an acid or alcohol solution can leave the coin with hair lines and discrepancies in the metal that may only be seen under the right lighting and magnification. 3 leave the pennies for around five minutes in the glass of vinegar or lemon juice. If you have a lot of coins to clean a coin tumbler may be the best choice for you.Brush your coins while they are still in your soap and water solution. Soda can be used with some bronze coins. Below are links to the best deals on coin tumblers i could find. Using distilled water is the best because most waters are treated with chemicals like fluoride which can react with the several metals that were used in minting the coins.
However coins made out of copper will be harder to clean as copper reacts to more materials than other metals. Mix dish soap with water in a bowl. 3 brush the coins with a soft bristled toothbrush or a paper towel. Many collectors use watered down pea gravel in their coin tumblers to clean their coins.
Make sure they are not directly on top of each other.
Source : pinterest.com