The Lotus looks great. What brands of materials are you using? Your work has a very artistic and bold touch to it. I can see bits of style from some of the other awesome artists that are members here...did they have any influence on you? or did have you been using that style all along?
Your background sounds a lot like mine. Feel free to ask questions on techniques or materials anytime. Keep posting work!!!!!
If you're interested here are a few books and links I still look through that have helped me along the way.
How to Draw Cars Like a Pro, by Thom Taylor
How to Design Cars Like a Pro, by Tony Lewin
Rendering With Markers, by Ronald B. Kemnitzer
Rapid Viz, by Kurt Hanks
www.cardesignnews.com (check out the tutorials in the process tab)
http://www.roadsters.com/art/