I did this project last year to try and get business from a potential client (toy design). I used photo reference to make the plan drawings and then used the plan drawings to make the body. While doing this, I ran out of cash to get supplies and ended up making it out of whatever I had laying around: paper, Apoxiesculpt, odd plastic rod/tubing. The underside was reinforced with Apoxiesculpt after I had covered the body in CA (I actually made a mold off the piece that you see). The Turbocharger is layered paper. I would probably do things differently with the CA as it left the surface very uneven (which I did not notice until after the mold was made).