design your own phone!!!

i'm bored with standard colours for phones. can someone tell me some pens you can use to make designs on your phone which stay permanently but you can remove and make another design when you feel like it or if you make a mistake, it's removable (and safe). or maybe some phone vinyls, like car vinyls but for phones. even if it is a decal saying nokia or sony ericsson. i want my phone to be MINE! the way i want it.