Well, that item I dug at my father-in-laws house that appeared to be a coin is not a coin on further inspection. Tried a few different methods of cleaning it but no luck. Rescanned it again with my Ace and this time I got a different reading than I was getting the first time. Read as iron this time, so I'm pretty sure I just have a rusted piece of metal that is the shape of a coin. Plan on heading back there soon to the same spot though to make sure I didn't miss what gave the the $1 signal the first time.
Until next time...
Keep your Coil to the Soil