Beyond The Exterior
Chassis
The level of detail I'm looking for on this model requires the chassis to be made up of nothing more than a simple surface that covers the open area at the bottom of the car body. This is probably fine for most purposes, but if someone needs all the under workings of an auto, you're in an entirely new realm of car modeling! I suppose that too is possible with HyperNURBS, but no one here is that ambitious, are they? :-)



Now, you'll want to work on the wheel wells to ensure proper fit for the surface around the wheels. Of course it's easiest to do this with the wheels visible! This adjustment is just a matter of basic point & poly manipulation while keeping an eye on various angles to make sure the surface goes where it's supposed to.
Well, that takes care of about two thirds of the bottom of the car. Of course, there is no surface beneath the engine compartment, but to avoid having a big empty space there, I put in a cube as a proxy for an engine. I haven't yet decided, but I might render with a reflective floor, and I don't want the floor reflecting a big hollow void and the bottom of the hood...