Paint and Assembly Process Advice

What color are you painting it? The reason I ask is that if you are painting a non-metallic color (or a color with little metallic in it) I would Spray the shell to include the engine compartment, door jams, interior, trunk area, etc. I would paint the doors, hood, trunk lid and front valances separately (off the car). Then I would assemble it carefully. (Basically like @forphorty did in his pictures) If you are painting a color with a high metallic content, it might be best to jam the car, assemble the car, and then paint it to help eliminate the chance of slight color variances that can be caused by painting the parts separately and then assembling. I have painted several cars that were metallic colors disassembled without any problems, but that is up to you.