Should come off with a hair dryer and by rolling the vinyl back over top of itself very slowly. Warm up a foot or so at a time and work your way down the car. Don't pull on it upward, or do it in a hurry. Even if the rest of the paint is not faded the paint under the decals is likely to look different from the surrounding paint due it not being washed and rubbed on by waxing etc. so a light polish job may be required.