Thinking more about the usability of the PhlatPrinter;
You could use it to quickly make a solid model of the car.
Just get thin slices from Sketch Up. Depending on the size,
say for a 12:1 scale 1 ft(real) = 1 inch (model), 1/4 in thick
slices stacked front to rear.
The temptation would be great to use plywood. Don't, the
alternating end grain will cause serious problems painting/
finishing later. Go for a not too soft, solid wood with a
suppressed grain like clear white pine or tulip poplar.
Once the "lifts" are carefully glued up, carve off the corners,
sand smooth and finish.
Voila! A 3D model you could take to any investor's/IPO meeting.