If your vinyl is meant to be outdoors for more than six months at a time, such as on exterior walls, car windows, boats, mailboxes and signs, we highly recommend that you use a 3 to 5 year outdoor vinyl. Other vinyls are thinner and will quickly crack and fade in extreme temperatures.
White exterior vinyl looks best on car windows because it is seen best from a distance. Silver, gold and light grey follow right behind, for a little more subtle colour.
Bear in mind that outdoor vinyls are more expensive.