My Es-9 is only about 8 months old, but the black coating...whatever that is ... in the fingerb oard is wearing off a lot. Looks like peeling skin after a sunburn in spots. Is this bad..good or neither? Doesn't effect playability or sound. Just looks bad and I'm worried that it's there for reason. Can I just sand it off completly? Nice enough wood underneath. Do I need to treat the fingerboard if it comes off or finish it somehow?? SO many qusetions.....