The single biggest problem is the one we were told to ignore and that is accuracy. As I alluded too, another issue is that most the game models I have seen are modeled to surfaces and not solids. This does not sound like much, but, can be painful. For instance, the Atom model that I have going on in another thread, the tires are surfaces as I had no intention of printing them. I am using some off the shelf Pegasus tires and made some surface representations of them as place holders. If I forget to turn them off the printing software just ignores them, anyway.
Basically if the model is a 3D solid, it is just a simple software handshake and make sure it is within your printing minimums and water tight.
Some of you undoubtedly know, but, you can save 3D data in pdf's. I have attached one of the 1/24th scale jack I did as a sample. Just click in the picture and rotate, pan and zoom with your mouse. There is also the ability to comment and measure and turn items off and on if it has been set up for it.
OMG! That's awesome.