Cleaning coins is not a good idea, it will damage the coins and lower or destroy the collectible value. Please consult a dealer or collector before the coin are cleaned.
You should seal it. Maybe stain it, too.
You should never polish old coins, even if they have turned dark or black.
A hamster cage should be cleaned weekly.
There are special coin cleaning cloths you can buy in hobby stores. You simply rub the coin really well with the cloth, then buff with a clean, dry, soft cloth. Never use water or any other cleaners on coins.
No, cause then they look older
There is no patron saint of old coins.
A horses stall should be cleaned every day.
Canada has dollar coins not bills.
No, cleaning any coin kills the collectible value of it.
Everyone should get their chimney cleaned once a year.
How should tender vegetables be cleaned before use?