Hi, Toshi - It's for you to decide, but I think the airplane would look so good if painted on one side, leaving the intricate and complicated internals to be seen. The aircraft was such a technological marvel, especially for the era.
Hey, how are you at preparing sukiyaki? My absolute favorite Japanese dish, followed closely by ahi and fatty tuna sushi, mackerel and taco are great as well. On my overnight stays near Narita I had a great restaurant close by, served the best Japanese dishes I have found. The owners wife was named Eiko, she made sure all was as perfect as possible, without fail it always was. When I retired I missed the visits.
Great job on the model, hope to see the finish soon.
Best regards
Patrick