Hello! I have recently bought an Ibanez Jem 7VP and I have noticed that the finger slots of the monkey grip are sort of grainy/rough, although the rest of the monkey grip is polished. Is this a thing on the Jem for gripping purposes? It is my first Jem and I have bought it online so if it is a case of bad finish I would rather send it back while I still can. Please help me!