or maybe the person spraying the can wasnt too good. i have seen rustoleum roll on paint jobs that look like a show winner at local shows.
a good painter paints good. its like tuning go to the tuner with most exp and people backing up his work. usually if you want a quality job you will pay more.
i am sure someone at CRC can paint with a spray can better than most who dont paint for a living.
painting is a skill so dont blame it on the can.