hmm... try this mate: http://www.3dcar-gallery.com/tutorial/less01.htm
use a dgs shader, read the tutorial to find out how to use it. then do this:
Shiny_u & Shiny_v: These control the amount of blurring along the U and V axis of a Glossy reflection. They are used to produce an anisotropic effect. Rough surfaces are usually made up of microscopic random bumps, producing a soft diffuse reflection. Anisotropic highlights however are produced form surfaces with microscopic bumps running along in an even grain. Reflections stretch in the direction of this grain, producing highlights that travel in one direction.
Imagination is more important than knowledge.