Like anything, the longevity of your paint job will come down to care. If you can keep your vehicle parked indoors, avoid weather, and keep the surface clean the paint will last longer.  Candy paints are more sensistive to sun fading than typical automotive paints so keep them in a garage or covered with a UV blocking car cover when not in use to maximize life.  Furthermore, using the UreChem glamour clear provides more protection than most other clear coats due to the high UV absorber content in the glamour clear.