Realistic Aluminum Material In Cycles? I need help, making a realistic looking aluminum material,  like in the pictures below. I would like to only use procedural textures within Cycles.  No external image textures.  Can anybody,  who figures out, how to make this aluminium material,to post his node setup, so, I can see how you did it. I wasn't able to do it, even after searching up online. 

The pictures of what I would like the material to look like are shown below.



And



And



Thank You!
Here's my latest render.  I'm not fully satisfied with it yet, but it's close.



Here is the node setup:


Click to enlarge.

It's basically an Anisotropic shader with a little bit of straight gloss, then a very light Fresnel component.  I then used a stretched noise texture to mix in a very small amount of diffuse (to make some cracks more pronounced) and apply a bump.  I've also created the below node group for a very fine grain, which is also used for bump mapping.



Note: the Translate and Scale group nodes are homemade equivalents of the corresponding parts of the mapping node.  They are explained here.

Like I said, I'm not quite happy with it yet.  In particular the flat end needs better texture coordinates for a circular bump (I'm having trouble creating a procedural radial blur) and the inside needs less anisotropy.