@Baggins
I must confess, I still haven't downloaded MatMatic or any of your Shaders Systems, I really have to change that, but not until I've done my reformat and have a functioning Poser installation.  My current one won't even save stuff properly so I just don't use it anymore.  But yup, I was hoping that learning the Poser Nodes the hard way would be beneficial to me in the long run, but for some reason my mind is just not with it when it comes to Poser's Material Room.  That said, I'm very interested in getting it downloaded now that you mention the Parameter Modulation thing, that's going to be interesting to look at.

Anyway, love the render, especially that oxidised rust effect on the underside edge of the grey shield, like you said, awesome!