A really good way is actually to leave it in a glass of Coca Cola or Pepsi overnight. It should be really clean in the morning.
But if the coin may have value as a collector's item, it should not be cleaned, except by a coin expert, as doing so can destroy its collector's value.
No. Coins always lose value when they are cleaned when compared to uncleaned coins (the exception being coins that are dug out of the ground that are encrusted in dirt). Do not clean your collectable coins!
If you think the coin may have some value as a collectors item, the best thing to do is not to clean it. Cleaning can reduce or eliminate any collectors vale.
The best way to clean a silver item like a cleaner is a commercial silver cleaner. Some other preparations like lemon juice and water are somewhat effective too.
The short answer is, do not clean your coins.WARNING - There is no way you can clean a coin without damaging the finish and reducing any collector value it may have.Some coin catalogues suggest that you might use a soft brush on copper or bronze coins and, that there are professionals capable of cleaning coins.Since you state that your coin is a collector coin, go with the short answer and do not clean your coins.The best way to keep them is in some form of a protective casing or packaging to keep dust, moisture and finger prints off them. Most coin dealers will sell something suitable for storing your collectible coins.
One way to know a coin is not silver is to check it with a magnet. If the magnet sticks to the coin, it is not silver. If the magnet does not stick, it still might not be silver. You can test it, but to do that you need a test kit.
the best way to clean copper or silver coins and jewelry is ashes
If the vase is silver then you may want to use silver polish, but consult the place where you bought it just to make sure.
The short answer is, do not clean your coins.WARNING - There is no way you can clean a coin without damaging the finish and reducing or eliminating any collector value it may have.If your coin has any collector value or you propose to sell it, you will damage the finish or lustre of the coin by cleaning it.The British 1942 Florin has a 50% silver content. Some coin catalogues suggest that you might use soap and water very carefully on silver coins or, that there are professionals capable of cleaning coins.If your coin has no collector value and you would just like to clean the crud off and make it shiny again, use a jewellery cleaner (which contains acid).
You can look on the rim of the coin and if there is no brown on it it is silver. If the coin is silver looking on the rim then drop it and listen for a high pitch cling sound which is another way to identify it.
No, if a magnet sticks to a coin, it means it does not contain silver because silver is not magnetic. The silver ring sound could be due to the metal composition of the coin or the way it was struck during minting, but it does not necessarily indicate the presence of silver.
If it is a coin, the easiest way to authenticate a silver coin is to take it to a coin dealer and ask them. Another way is to weigh and measure your coin yourself, US coins are generally made to strict standards so no genuine coin deviates from the standards often. If your coin does not weigh the same as a genuine silver coin or if it has a different diameter or thickness, you most likely do not have a genuine silver coin. Coins that are significantly overweight or underweight are usually made with a cheaper material such as lead, silver-plated copper, nickel or any number of base metals.For other items, the best way is to buy a silver testing kit or take it to a store for testing.
The best way to clean a dartboard is with a cloth and shining polish.