However because this new coin is being touted as very secure and not falsifiable, people may not catch on to the fact that you are counterfeiting the coins, because they might just assume that they cannot be counterfeited. So perhaps counterfeiting the coins would actually end up being profitable in the end.
Also, it might even make counterfeit coin production cheaper if it replaces rather than supplements current detection methods - maybe a counterfeiter can make a plastic or wooden coin of roughly the right shape and paint it with a paint containing the appropriate mixture, and then trick a vending machine into giving them non-counterfeit change.
Usual weight, magnetic and maybe inductance tests apply.
I also wonder about someone's ability to take slices of the surface of a coin and spread that out over other cheaper coins. I guess you have to randomize the test, or make sure it covers more than just a couple predictable spots on the coin.
