This cool promotional video uploaded by Virgin Australia shows how they repaint one of their Boeing 737. They do all by hand and, in this case, it took them 11 days, 18 painters, and 260 liters of paint to get the job done. My favorite part is when the paint melts, I could spend hours watching just that.
But not all airlines do this job by hand. This video by Boing shows that they also use robots to paint their aircrafts.
via Gizmodo
Removing paint from a Boeing 737 is one of the trippiest things ever