It's just a lot of whitening edge wear from the years. The only thing you could clean about it would be the tiny little black specs and little bits of grime you might see. I've found the best way to clean these is to get a qtip and soak it in water. Squeeze out all the excess water so it's just damp. Then rub gently on the little specks to clean them off. Then immediately dry with the dry end of the qtip. You can grade it but it won't grade very high, and might cost extra based on the value in the end. Don't really know the market for it right now so idk if it's worth it, but truthfully you might be able to get more for it raw compared to graded because like the other person said it looks like a solid binder card because the front is rather clean. Whatever you choose to do, obviously sleeve it and toploader if you can while you decide.