For highlight, I used a very pale yellow color, with both brightness and shiny-ness turned up in the 80's. I wanted to give a sort of shiny appearance to the material. In Effects, I turned up the Contrast (in v.3, it's "transition to shadow" made "harder") so the shadows would be darker, the lighter parts lighter. Then I set it for a rotation of X-45 degrees, just to give it a better appearance than stripes cutting straight across the model. :)