The car company Nissan has come up with a new case, the “Nissan Scratch Shield,” that will repair any scratches to the glass on your iPhone 4 or 4S. All you have to do is put the case on your iPhone and the scratches will vanish.
Nissan actually is using the same technology on this case as they do in the cars they produce. They coat the case with a kind of paint that can “heal” itself when damaged, call polyrotaxane. The chemical structure of the paint can go back into its original form in as little as an hour, or up to a week, depending on the how severe the damage to the paint is. When the paint is going back to its original form, it actually fills in the scratches on your iPhone and makes them disappear.
Unfortunately, this case is only available as a prototype right now. Hopefully we’ll see this case in the future!