How can I make a dark and scratched metal material? I am shaping this watch as a training. I did materials for needles and branchs but i'm stuck for the core watch's material.

I'd like to reflect the light like this :



I use Blender Render for now.
If you can help me, it would be nice ^^

Btw if you have any good tutorial for materials especially those with specular shaders and mirrors. Sry if my english is bad, i'm french :s

Actual rendered view (not full render) :
I have finaly done it with nodes and a hard night :P
Thx for all