In the photo above you can see the rabbit-cut 2x4's, and the large plywood slide out surface, in the process of staining and sealing. I found myself a nice Red Oak stain that matches the armoire. I picked up some heavy duty drawer sliders, rated for 100 lb. load. I wanted beefy slides, so I wouldn't have to worry about leaning an elbow on the desk, or pressing too hard when cutting some plastic card.
1/2" mdf was used as a brace in the back. This served as a stop for the slide out, as well as additional support for the upper desktop surface.
The whole assembly was mounted inside the cabinet, and I moved onto the desk top surface. In order to keep the "soul" of the project, I made the desk top out of, well, a desk top. My old hobby desk served proudly for many years, as the nexus of all things plastic, glue, and paint. As this project was replacing my old, reliable desk, I felt it only fitting to retain some piece of it.
As I move on to the interior walls and shelving, I'm left with many decisions to make. Progress will more than likely slow down, as I've got to decide which direction to take this in. I know I want some pegboard for modular storage capability, but I don't want to lose too much of the beautiful wood interior. Possibly a pegboard wall along the back, with wooden shelving built into the sides? I'm also planning to mount a handful of lights inside, like an OTTlite for painting, and several led spots for model photography. The trick will be making a central switch panel.
Also, at this point I've decided the spray booth will have to be a separate unit, not hard mounted inside the armoire. As trick as it would have been, it would require the entire piece be pulled further out from the wall to allow for ductwork. Likewise the fan would have to be mounted on the top, which would be far too heinous for my liking.
See what I mean? Lots of decisions to be made. Feel free to offer any suggestions you might have, I'm always open to input!