Thanks, Marko. I Checked out his website. Very cool stuff. It looks like he makes his own "mirrored" stock from what I can gather.
Here's what it says about it:
Silver
Clear plexiglass with silver metallic paint on the back.
That would account for the difference I'm seeing in your mirrored PG compared to Rocker47's mirrored PG in the pics further back in the thread. I bet that would be a cool process with gold metallic paint as well.
Gold mirrored would look really cool with gold hardware too.