LG's fancy new curved smartphone seems a little gimmicky at first, but it might actually have some innovative stuff going on. One of the surprises when it was finally announced a few weeks back was the "self-repairing" back material. Now you can see that capability demoed on video.
In the video, a wire brush is used to scratch up a regular plastic back panel and the G Flex back. With 500g (1.1 lbs) of pressure the scratches are almost completely gone after a few minutes.