After trying with very bad results to model a VW Beetle, I decided to follow Karabo’s Fiat 500 modeling tutorial (http://www.3dtotal.com//team/Tutorials/fiat500/fiat500.php).
The progress and “final” result, using both Blender internal and Yafaray, can be seen on my YouTube channel: http://www.youtube.com/user/Urenze
I know there are many things that could be corrected. The one I would be very grateful to know about is why there is so much noise in the Yafaray renders; there are odd, grainy glares on the model; little white dots here and there.
And below is an still image of one of the Yafaray + sunsky renders I did.