How about going to a company that make stickers (liker bumbler stickers) they also make static cling. You can also have a "wraps", sort of like a whole body sticker. These you see on race cars and on advertising stickers on cars and trucks. These are stretched around the body of the object being decorated. It keeps the item covered, but does not damage the original paint finish. Whatever can be designed on a computer can be done on the wrap.