building some special metal material

[thengineer]

hi guys!

I'm currently working on a material/shader that looks like the following metal:


My version:

It's based on the A&D mat.

It's not the best, thats why I'm asking you for advise.
I've also tried out Jeff's nickel material, which comes really close:

(I hope Jeff doesn't mind posting his sample here)

The problem is, that his material is so slow due to the uber high sampling rate in the metal shader.

I hope you can give me some suggestions on how to improve my material.

greetings,
Jack