I threw together a rocket finishing stand today, to hold and rotate rockets while doing things like filling spirals, applying decals, touching up paint, and so on. I don’t know if I’d use it for spray painting… might, though. I can’t claim it’s original, it’s based on something I saw in a photo on the Rocketry Forum.
Here it is, upside down during assembly, after I used screws and glue to attach the sides to the base.
The sides and base are 1 x 3 pine. The dowel is nominally 1/2″ but actually a little smaller. I wanted the dowel to be fairly snug in the holes, but able to be turned, and I found drilling 31/64″ holes gave me the fit I wanted.