Great question! It comes down to the fact that I can't paint inside if I am using spray paint or model spray paint or clear coats or whatever. I don't have a ventilation system set up or anything, and painting with spray paints, enamels, clear coats, etc., it all gets very "fumey" indoors. So instead of painting inside I paint in the garage. My garage, unfortunately, is not insulated... so when it's really cold, even though in the garage is much better than directly outside, it is still too cold to paint. The cold air can drastically affect the way the paint or a clear coat leaves a spray can and you can end up with really crappy looking results.
Now if I am painting something by hand (the control box, let's say), those I can do at any time because I just do them at my work bench. But to get a uniform look on the launchers without brush strokes I have opted to use spray cans, thus the cold weather issues.
I have also considered investing in an air brush which would make painting indoors MUCH easier as I can accompish similar and almost certainly better results as a spray can but do it in a much more controlled manner indoors.
Thanks for the kind words about the control box. An out of the box accessory, for sure, but I am super happy with how it turned out
