If you have a pristine example of an nsx, the answer will always be NO, Don't do it. If you are like me and mine, with areas already painted, and some crappy body work and door dings to match, go for it. I think that when I paint the car, have all the dings removed, and the bodywork fixed, it will definitley up the value of my car. Not right away, if looking at cost vs return, as I figure about 6K to do it right. BUT, if I keep the car another 5 years after the work, it will a) look so much better and bring me so much more happiness and b) be taken care of so much better that the condition will look better 5 years from now as it does right now, that paintwork in my opinion is the only way to go. Besides, in 20 years, my guess is that only the cars that have never been outside the garage, will not need something painted. Others will disagree, but look at what people say about actual paint lifetimes, even when they are taken care of. JMHO
Tom