Time and bacteria can sometimes leave marks on coins.
zinc is 97.5% of the penny and copper is 2.5% of the penny
Penny is not a proper noun.
many people dont think penny can have a suffix one may be penniless.
The plural form for penny is pennies or pence.
A penny earned is a penny saved means the money you save (and you don't spend) then it is earned. Because you don't waste it so it's practically saved.
Shout removes stains from jam, grass stains, coffee stains, ink stains, blood stains, motor oil stains, etc.
Grass stains or food stains.
Salt and vinegar. The vinegar cleans off all the different types of rust and build up off the penny, and the salt speeds up the process.
Stains
I don't know why you are cleaning a penny with juice but orange juice. The acid found in orange juice if left touching something for long periods of time can start eroding the surface , removing stains and rust.
i know it FOOD stains
The population of Stains is 33,951.
What detergent removes grass stains What detergent removes grass stains
oil stains
Different stains affect clothes in different ways. Dyes stains occur when a dye is absorbed into a piece of fabric. Tannin stains deposit color on top of the clothing. Protein stains have proteins which interact with the fabric. Oil stains resist the water which is used to clean them.
Club soda is supposedly useful for removing white wine stains, tea stains, red wine stains, and make up stains from clothes. In general, it is useful as a general cloth stain remover.
bleach stains cannot be removed.