Question. This penny looked almost like there was clear fingernail polish on the obverse. It looks like a super thin coating of something. It looks worn on most of the high devices or whatever they are called but its there. On the reverse, it looks like any other penny. Did the mint ever put any coating or anything on pennies? I always thought polishing was just a way to smooth them real nice like in a mechanic sort of way. You can kind of see it in my pictures but its alot more obvious in person. Im guessing some over zealous person put something on it years ago???