* How it works: Nail polish remover contains acetone or ethyl acetate, which are solvents. These solvents can dissolve some of the dirt, oils, and oxidation (tarnish) that make pennies look dull.
* Effectiveness: Nail polish remover might work on lightly tarnished pennies, but it's not as effective as dedicated metal cleaners or some DIY solutions.
* Safety: Acetone and ethyl acetate are flammable and can irritate skin and eyes. Use nail polish remover in a well-ventilated area and avoid contact with skin.
* Potential Damage: If you're dealing with rare or valuable pennies, nail polish remover might strip away the patina, which collectors value. It could also leave a residue that dulls the coin over time.
Better Options for Cleaning Pennies:
1. Soap and Water: For lightly soiled pennies, start with warm water and mild dish soap. Gently rub the penny with your fingers or a soft cloth and rinse thoroughly.
2. Vinegar and Salt: Soak the pennies in a mixture of white vinegar and salt (about 1/4 cup vinegar and 1 teaspoon salt) for a few minutes. Rinse well with water and dry. (Be careful with this method, as it can etch the coin's surface if left too long.)
3. Commercial Coin Cleaners: These are specifically designed to clean coins without damaging them. Follow the product instructions carefully.
Important Considerations:
* Collectibility: *Never* clean rare or valuable coins, as it can significantly decrease their value. Leave cleaning to a professional numismatist (coin expert).
* Patina: A natural patina (the aged look on a coin) is often desirable. Cleaning can remove this patina, making the coin look unnatural.
* Rubbing: Avoid rubbing pennies vigorously, as this can scratch the surface.
In summary, while nail polish remover *can* clean pennies, it's not recommended due to safety concerns, limited effectiveness, and the potential for damage. Other methods are generally safer and more effective.