take a look at the right thread. The materials are not very clearly. You should also take a look at the texture. And the Scene is without the RAC. If you put a skinable box on the front of the trailer it might look better.
They are based on these two drag racing cars. Liqui Moly Speedster and Liqui Moly Bug.
The UFR is quite easy to skin.
Comments and criticism is always welcome.