Wauw! Nice model lealar. That put's my efforts at cars to shame.

It will be looking great after you get the headlights and air-vents in the bumper filled in.

Not quite sure what you mean by "help me make better ok of rend?"

If it's about adding detail. Sorry - I'm not very good at that at all. (yet)

If it's about improving the look of the car then, how about using the "Mi_car_pain_phen" shader for mental ray? There's also lots of shaders around for doing metallic or pearl car paints.

Also, search for
Metallic Shaders
Tutorial by Cris Hunt at highend 3d. Don't have a direct link, I've only got saved version on my hdd.

Also, here's something I've got kicking around - never used it though, so I can't offer any help on it.

Hope that's what you meant.......