Good evening. Hunting rolls I came across this Idaho State Quarter
. The obverse is normal considering it's been in circulation. The reverse has multiple little dots all over it. It feels it too. Running my finger across I can feel them. I soaked it in acetone thinking glue or whatnot but it did not come off. I took a q tip and rubbed it with warm water and light soap. Still there. It is in the coin. It looks like a type of fabric and feels the same. I know you guys can look and tell me if it's my mind playing tricks or is this struck through cloth? Thanks and God bless. Happy hunting everyone!