This is the back of my boss's Iphone 4. Now he doesn't take the phone out to clean it, but he has only had his Iphone 4 for 1 week and 2 days.
All those white spots you see are little gouges in the back of the phone along with scratches. I didn't take pics of the side of the phone but the antenna was just full of crap and also scratched because the case fits very loose.
My personal opinion is unless you have a skin on the back and sides, avoid this case.
Thought I was in the accessory forum, mods please move. Thanks!