rh - Strange how a small coin project takes over the entire house. My project of searching 15 pounds of wheats has taken over the dining room for the past week.
I cleaned with a nonabrasive adhesive remover and carefully with a Qtip, then rinsed in distilled water. Sometimes I can't get the gunk off and I have to put more pressure into it than I wish... but with these coins only worth a nickel each I suppose finding a RPM is worth it.