an nsx that has been damaged can be properly restored so that it's as good as new. The problem isn't that it can't be done; the problem with a car with a salvage title is that there is a whole lot less financial incentive to spend the money needed to do the repair properly, and it's much more likely that a repair will be done cheaply rather than properly and completely. An nsx is very expensive to repair, which is why they are often totalled by insurance companies who know that the cost of repairing it properly would be more than the car would be worth. (and no, they don't brand a car with a salvage title when it needs a minor repair like bumper damage, so don't kid yourself.)