I just purchased a new Belkin Grip Vue and have read how it can scratch the back of the phone if any debris gets in between the phone and the case. I was wondering if it is OK to reapply the factory plastic that came on the phone to the backside if I cut-out the camera area? Will the original film plastic cause any damage to the phone? I cleaned the plastic with tape so lint has been removed. I assume it is OK to use it, but wanted to check with some other iPhone users. On the front I have a commercial screen protector already applied. I am just wondering about the back of the phone. Will it hurt the phone in any way to use that original factory plastic?