Hi David,
for anything metal, I start with the SLA Danel Shader, and then just play around with the reflection and specular parameters until I'm happy. If you want a brushed metal look, play with the anistropic properties.
You can also download shaders from a variety of sources (
Deepshade is a great place to start). Start at the Maxon Website, and go to the
shaders page where you'll find links to a lot of shaders.
m A r K