I thought of this from the website http//www.colorwarepc.com and they let you to ship in or buy new different electronic gadgets and they will color them for you sooooo what if you where to take an IPod touch remove the back then sand blast and DuraCoat (relatively expensive but will stand up to almost anything, it is basically fancy spray paint) the back they also offer headphone and home button colorings but I'm not sure how hard that would be, the headphones shouldn't be terrible to do but they would take a lot of time. Duracoat offers nearly endless numbers of colors and is used on firearms and is able to resist the wear and tear you can find it hear http://www.lauerweaponry.com/ i just feel that this would be really fun and simple to do and the end product would wow peoples friends and would just be amazing to have can you imagine saying i have a glow in the dark IPod touch 
, yes they even offer glow in the dark paint