How can you Safely Paint a Laptop?

An anonymous coward came forth and wished to query all on this issue: "Has anyone ever painted their computer? I know you can buy some really cool cases on the net; but I have a Toshiba Libretto (running Linux of course) so getting a new case is out of the question. Does anyone have any suggestions on how to go about changing my little toy's colour (while not accidentally painting the screen, keys or anything else that is important)?"