No, cleaning any coin kills the collectible value of it.
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.
The 1943-S Walking Liberty half dollar is not has common as no mint mark coins of the same date but does not carry much additional value. Most coins of this era show heavy wear. With silver now so high ($35) as I write this, the coin's value is mostly from the silver content. As silver as increased in price, the numismatic value has been passed. Based on silver, most dealers would give you around $10.00 for it if in average condition. if cleaned/abused then less. If this was in Mint State, then much more.
No, for silver coins as the value of silver changes the value of the coin changes. The same is true for gold coins.
Yes, cleaning a silver coin will reduce its value. Coins that are cleaned can be easily detected. The coin will not be worthless, but may fetch a lower price. It is better to leave it tarnished.
With those dates, the coins are Silver Eagle bullion coins that are made from one ounce of silver and value is whatever the spot price of silver is at time of sale.
The mint never struck any silver 1 cent coins of any date, if it looks silver in color it's likely been cleaned or plated or possibly a replica of some type and has little or no collectible value.
Pre-1965 silver coins are worth more for the silver than face value.
Yes. Silver coins are worth more than face value.
The value of silver changes by the hour, so yes
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!
Common date silver coins follow the spot silver value. A dollars worth of 90% silver coins contains about .72 troy ounces of silver, so .72 X Spot is the "melt value." Dealers will usually buy for about 90% of melt and sell for 110%. Numismatic values of scarcer coins will increase with the spot price, too, but not proportionally. When silver prices hit $50, many coins with a small collector value disappeared because they were worth more to melt, and those worth a significant premium hit new highs, too.
Gold and silver coins