So! I've been trying to build one of these as well. And I'm on board with you; I want it to look like that. My plan has been to do some variation of paper mache, then water color over it, followed by sealing it with some sort of ultra smooth, opal/pearl clear coat. I think it's definitely possible, I just haven't had a chance to implement yet. I'll be watching to see how yours turns out! Good luck!