Depends
Very hard question to answer and not sure there is any definitive answer. So many variables go into the "lastabilty" of an paint job. 1. Starts with the metal/primer prep and application. Next, how many coats of clear? Next when finished is the vehicle kept in a garage or sit outside all the time. How much sun does the vehicle get daily? how much time between painting and putting the car into service? "MOST" paint jobs fail from underneath....meaning problems with the metal/plastic or the primer. The next most common is sun damage. I know of a base clear paint job on a truck that looks "as new" that's 10 years old (but its kept inside when not driven and kept clean and waxed), I just saw a hood painted two years ago that had to be repainted last month because of clear coat failure due to sun!
