Spray paint can do wonders to almost any material. Without touching it, you'd swear it was constructed of seriously solid wood or metal, not paper mache. Regardless, it was a throw-away prop that wouldn't have likely survived in someone's closet beyond a decade or so. I don't quite get why knowing about the construction materials is important. If you capture the surface contour and texture visualized in the episode, you're all set.
That reference to Bugle snacks was hilarious! I found another video on You Tube that's somewhat amusing: Best Dutch Snack Ever