I don't work there but I was at Boeing's Future of Flight at Payne Field on Sunday. Up for delivery are 1 AF 777-300ER (someone took it for a pre-dawn spin early Sunday morning), 1 KE 747-400F, and the 2 apparently-complete Ethihad 777-300ERs as well as 3 in various stages of completion as well as one of the 1st 2 777-200LRs that PK should be getting soon. The tour guide mentioned that painting takes less than a week, and can be quite fast if the paint job is simple (like a simple monochromatic scheme?)