Nice, but he will have a lot wet sanding and buffing to do. I see a lot of orange peel and dust nibs.
I painted the insides of the sail panels the same time I did the car, PIA, but I used that method for both 914's I have painted. I paint the doors and trunks seperatly, I don't like to jamb cars. Personal preference, never had a problem with shade variance...yet!