Knowing the potential for metal on metal contact, I took extreme caution when installing the Graft Leverage Case. Having read the complaints on scratches I had decided to remove the case with just as much caution to inspect my own phone. Sure enough, the scratch is there on the top band after having the case on one and a half days.
When you loosely latch the Graft Leverage Case it appears that there is no way the case latch could be making contact with the metal band of the phone, but when you inspect it closely (at least on mine) it does appear that the latch would almost be flush with the phone itself and hence the reason this is occurring.
Having upgraded to the iPhone 4S from the iPhone 4, I decided to put the case on my iPhone 4 to see if I could recreate it. Installing and removing the case did not cause any scratches. Installing the case again, I decided to try and simulate how I would normally handle the phone, pocketing it and un-pocketing it, etc. I removed the case shortly after a second time and sure enough the scratch was beginning to form. When the case is latched, there has to be some kind of minimal contact occurring. With both phones I am noticing the scratch, if you can call it that, is appearing on the top band towards the front of the device — this also appears to be true of sh0ebox's experience, per his pictures.
It is hard to capture the scratch because, as others have mentioned, it is very much a thing of reflecting light. If any of you have an iPhone 4, it is very much the same thing that happens with the 30 Pin plug making contact with both sides of the socket.
Do I like the case? Yes.
Am I bummed about the scratches? Yes.
Can we take preventative measures in placing tape to prevent wear? Yes, I for one am going to place tape.
Do I recommend it? Your call.
Unfortunately this type of wear seems inevitable, especially when others are sharing similar stories with having Apple Bumpers and that is saying something considering the Apple Bumper does not have any metal latches. Perhaps it boils down to a matter of friction; something happening with the constant contact with the phone and the case. Like my brother said in his experience, sometimes the best case is not having a case at all. It comes down to how we view things. sh0ebox and zelaya said it: "It kinda sucks, but it's not a huge deal. The phone is going to show some wear and tear eventually … no way to keep it perfect forever" and having a case on constantly "at the end of the day 'what you can't see won't hurt you.'" Sucks, but that is the truth.