But them having spots on them does not change that. Many, a very great many, uncirculated coins both old and new have spots on them. The one and only thing that can change an uncirculated coin into a circulated coin is wear.
Anyway to safely remove these spots? Xylene or acetone? I have a few great unc coins that have similar spots.
Highly doubtful either one would remove spots from a coin as both are very limited in what they can remove. The thing about spots on a coin is this - it all depends on what caused them, and there are a myriad of things that can cause them ! So before any recommendation can be made regarding removing them, one first has to see, at the least, good quality pictures of the coin in question.
My comment referred to uncirculated coins. They are minted by the millions and with no special handling of any kind, just jumbled in with other coins, dumped into bags and thrown onto trucks for distribution around the country. Anything can happen to them in the process, including the water spots.
Yup. When Littleton advertises "uncirculated" recent coins, there is NOTHING special about them. They are run of the mill production right from the lines. Just everyday coins for commerce. There is BARELY anything extraordinary about even mint-packaged uncirculated sets. They do tend to run a slight bit nicer than regular production.