Indeed! Good answer! So, then, say....an orchestral snare drummer or a marching snare drummer who never hits a cymbal with his sticks will not suffer these dirty black marks on their coated drumheads then, right?
Well...there will be stick marks, but probably not black ones. Eventually the coating will wear off from normal play and it will discolor the head, just not in the same way that would happen with a drumkit.....