How can I create a machined look like this

[Yabusa]

I tried playing around with "Stainless Steel Radial Brushed", but it maintains a circular pattern. Is there a way to make it only a quarter of a circle instead of an entire circle?

[DMerz III]

Not sure if this is the whole answer - but I know Will had done some work in this area before. Here's a video he made that you might find helpful in setting you in the right direction.

https://www.youtube.com/watch?v=7MjLhSxgoUg