Let's all look at it this way folks... it isn't going to get sold, it has sentimental value and in the best case, full on original NOS collector version of it we are talking about $28K. That puts this one likely along with all of the other FJ's in the trader at mid teens. Cheaper than almost anything you could go buy him, a lot more fun and with the aforementioned sentimentality.
Let him paint it any color he wants. It is either his car, or it isn't. I have never seen someone love a collectors item... car or otherwise.
I think it would be cool in camo personally.