Will vegetable oil clean a penny?

No, vegetable oil will not effectively clean a penny. While it can temporarily provide a shiny appearance to the coin's surface due to its lubricating properties, it does not remove dirt, grime, or oxidation. Furthermore, vegetable oil can become sticky over time, attracting more dust and dirt. To effectively clean a penny, it's recommended to use methods like soap and water, baking soda and vinegar, or specific cleaning solutions designed for coins.