So I have a space black series 2 on its way and I know I won't really need to worry too much about scuffing it up. But can anyone tell me what kind of wear and tear the black insert on the digital crown gets over time? I actually don't have any idea what it's made out of or covered with. Just assumed it was plastic. Maybe glass. Any thoughts? I actually have a little circle in the armorsuit kit that I can cover it with if I want to keep it pristine. But wasn't sure if that was even necessary.