i4u has a small review about the ShieldZone for the ipod nano, an invisible protection case for the Apple product. It has been tested against a paper clip, a screw driver and it didn't stay with one scratch, while the material looks soft and it doesn't seem to give much protection, that's not exactly how it works.

A cool thing about the applying the ShieldZone on to your iPod, is that the previous scratches will disappear, so long ugly Nano. It costs between $10 and $24, depending on the version of the iPod.

The end result is worth it. The shield is really extremely tough. Apple should look into making surfaces for their products like that

Read the full ShieldZone review at i4u