metal looking 3d shape - shader?

Hi, all,

How to give in a easy direct way a 3d shape a metal look in realtime? I want to do that without using a texture!

I think this is possible with a shader.
But is there already a good shader to do this? Do not know how to write shaders.
I haven't find a good one in the shaders that are in Jitter already. And i have already checked this forum.

Thanks for fast answere, greetings, bitter