The main inaccuracies on the upper deck are the seats, too wide and not enough detail . Also, the first run kits, like both of mine, have the inner airlock door molded upside down. I used the same colors for the main deck floor as used for the lower deck floor and walls. Be sure to study any photos you can find, to get the proper amount of detail on the wall panels. Unlike the lower floor, the main deck can be painted and assembled pretty much according to the instructions.
Care is needed when assembling and painting the freezing tubes and elevator cage .
The miniature J2 is all wrong, and it is on too thick a support. Finally, I got to the outer hull. The parts are done nicely, but there are swirl marks in the pieces, so get out the sand paper and polishing kit. I finished with a soft cloth and a little fine polishing compound. Pick the metal color of your choice, just remember, the studio model was a very dark Aluminum.