Cheers Dave

You could up the spread a bit on the AO too (around 1.1 to 1.5 and also the distance to 2000 +), its better but still a bit burnt. put samples to 64 as well. Also up the AA in the render setting min -1 max 2 should do it. It will be longer on the render but should look sexy once its done. Justdo it so you can see the the shape of the vehicle better too

good wires mate

J