I believe it's possible to buy spraycans with liquid rubber, so I'm wondering if I could thoroughly clean my iPod Touch 4g, cover up all the openings, volume buttons etc. and use this to create a permanent rubber surface to prevent scratches and (to a certain degree) also protect against dropping it etc. I think you can even get transparent spray-on rubber (so as to see the Apple logo, model number etc. on the back). Has anyone tried this or knows if it'll work (will it properly attach to the smooth metal surface of the iPod)?