This was one of my sets from Eric's contest and im starting to worry about the toning.I'm going to try to get better pictures,it doesn't look bad by the photos but its more cloudy and the ken half is starting to loss its luster and shine the most.The set is stored with my other coins and this set is only changing out of my other stuff.
The quarter is the only coin out of them all that remains original for now,they look worse in person.
Go ahead and crack them out, and see if you can clean them up with some MS70. If you decide to do this, be sure to take before and after photos once you've removed them from the case.
Ok ill think about it but really didn't want to clean them although the damage has already been done.Guess i can at least save the quarter which has remained normal.
The whole point of "cleaning" in the sense of conserving, is getting to the discoloration (i.e. toning) before it gets to be damage.