Just knock up a rig with a BBQ rotisserie, some brackets and wood. You'll just need to add some end-caps to spin it on. Can be used for F/Glass tube rolling and painting alike.
I take a used motor and glue a dowel inside it. My spray box is a big heavy duty cardboard box our microwave came in, so I punched a hole in the top I can stick the dowel into and leave it upright(ish) to dry.
I use a very simple setup for painting my rockets: I have an old flower pot (very big pot) with a hole in the bottom. I turned it upside-down, and now I can stick any small rod/dowel/pipe in the hole. The rocket simply goes on top of the rod, and gets painted.