Here is the completed engine for this 1/24 scale model.
...And the interior sub-assembly.
There are some panels of wood that show under the car. The plastic has wood grained planks molded in. I first thought to paint these black, then tan, then sand lightly so the raised detail (the grain) showed in black.
I wasn't happy with this though, so I just used real wood. Sanded and polyurethaned, this looked pretty good.
Here is the completed chassis.
Googling up photos of the actual car, I came across a red Duesenburg that had a red stripe around the wheel edge. That specific car had solid, not spoked, wheels, but I thought that was a nice detail so I went ahead and add it.
The major body parts sanded, primed and sanded again...
It's starting to look good. The paint came out much better this time than the last.
There is a large amount of exterior detail yet to do though.