what shall I do first?? Door wells or the Body?

I'm just starting in the Game and was gonna paint my Truck (clear coat Faded and Chipped from the Sun here in miami)I have the Truck Stripped of parts.this weekend gonna wash-sand-and start taping up the truck.but once everything is prepped. DO YOU GUYS START WITH THE DOOR JAMS OR THE OUTSIDE OF THE CAR FIRST?