This looks great, the only unsolicited critique I have is that some of the forms are wonky. I think if you did a clay pour into your pepakura and then refined the forms in the clay casting before molding with silicone, you'd have more refined and symmetrical forms. Of course, it depends on the desired look. I just wanted to let you know for the future if you're interested, pepakura is great to get general forms, but secondary refinement would be easy in clay. A one-piece silicone mold would be easy to pour up against a clay pattern and many pieces could be cast from it.
Love the finish, haven't checked out the instructible. Was this vacuum metalized or cold cast? Great finish!