Formula 1 racing is very popular in the world.  F1 in the Schools began around 2005 and is still viable in the US and internationally.

North America version: F1 in the schools, North America

Download the Rhino Racecar tutorial. Done by Jerry Hambly.  This is a great tutorial for creating the model to be created using your CNC router
Rhino Racecar.zip

This Rhino tutorial is a perfect model for practicing modeling and rendering techniques.