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www.reference.com/article/clean-pennies-e1a7037526504ce5

To clean pennies, make a vinegar solution, and let the penny soak for five to 15 minutes before rinsing and drying the penny. Polish it further with baking soda if the shine isn't satisfactory. Avoid cleaning collectible pennies that have numismatic worth, as cleaning t...

www.reference.com/article/can-use-clean-old-pennies-8ad7208db873b629

One way to clean old pennies is to soak them a solution of salt and vinegar. A mixture of ¼ cup of vinegar and 1 tablespoon of salt cleans 20 to 30 pennies in about five minutes.

www.reference.com/article/clean-vinegar-4a37e5b4c1d70b65

To clean with vinegar, mix together one part vinegar and one part water in a spray bottle. Test the solution on a small area, and then spray the entire surface to be cleaned. Wait a minute for the cleaner to loosen dirt, and wipe with a soft cloth.

www.reference.com/article/s-juice-use-clean-pennies-74314a85a88b17bd

The best juice for cleaning rusted pennies is lemon juice. The amount of vitamin C is very strong in lemon juice.

www.reference.com/article/juice-cleans-pennies-a97d070337261591

The acid level in lemon juice makes it ideal for cleaning pennies, according to About.com. The juice should be diluted with water, with salt added to the mixture. The pennies need to be left to soak in the mixture for five to 15 minutes and then removed and dried.

www.reference.com/article/juice-cleans-pennies-better-c3df1f8e45d07037

Juices with an acidic base, such as lemon, dissolve the tarnish, which is copper oxide, from a dull penny. Other substances, such as Coke, Pepsi and vinegar, also make a penny shiny again.

www.reference.com/article/vinegar-clean-gold-17dfa2d6b8274d09

White vinegar is a solution that can be used to clean gold. Soaking the gold in the vinegar for up to 20 minutes then rubbing with a soft cloth can restore its natural sheen.