I tried to follow in my steps, and this was the result.
The spirit of using natural wood from fallen trees. Substance had a crush. And it took this car with it. I couldn’t save… More to come soon.
The NURBS Polysurface
The ExtractRenderMesh
Selected 7738 vertices
Wrong UV mapping using UDIMs (Bug report AM73 RH-96709)
Shaded
An early attempt using low-poly LOD
A second vertion
It would be great to see your model machined in wood. 
I love these sooooooo much.
very nice!