Another work with my friend. Model comes from Assetto Corse, materials and minor fixes are created by me
Hope you enjoy 
Render time: 21 minutes 35 seconds on Blender Internal.
Very nice! maybe 1 level higher subsurf to smooth those reflections just a little more. You could also look up advanced paint shaders that, of course, will mean nodes, but they look more compicated than they really are.
Next time I will more carefully on reflections but thanks you.