I chose to make a bodysuit rather than use body paint for practical reasons, not because I was lazy or a prude, as the internet likes to think.
#1: A bodysuit only has to be painted once, so I can bring it to conventions and not have to waste the whole day being painted.
#2: Finding and hiring a talented body painter would be expensive, and take FOREVER to paint to get it as accurate as the bodysuit.
#3: Paint smears.
#4: I have trouble giving artistic control to strangers, and painting it on myself would be impossible. Need me to keep going? :P
More info here:
Matt Rhodes, the character designer for Jack, wrote me an email with many happy expletives in it. I think that is an award in itself. I'm going to print it out and frame it. Really.