Panels are painted in car position as a set to ensure proper paint finish. They added a new wet sanding line that uses robots to wet sand panels to reduce orange peel. This was a big initiative for Bowling Green to improve their DOI numbers for the paint finish.
The time to run a vehicle through the entire system would depend on how many vehicles are in the system. The first piece of sheetmetal being laid, then going through paint, and then through final assembly, and pre-delivery. Good question to ask someone at the plant.
I worked in an assembly plant for 21 years. There are more factors to building a car than most know. Sequencing for colour in paint shops, body styles in the body shop and mix in Final Assembly. Those window stickers are printed in mass lots and once a vehicle is sequenced it cannot come out of...
Stickers are typically printed within 24-48 hours before car is built so they are ready for the assembly line. Depends on when they update this database.