RE: Painters ?????
Two suggestions....either "jamb" the plane like you would a car or make holding jigs using more than one of the hingle holes. If you jamb the plane, you can paint all of the leading and trailing edges, canopy edges, gear doors, etc etc, then assemble the plane, and paint the rest.
I use dowels in two hinge holes, then stick those dowels in a piece of foam, then paint. I assemble after the base color, then put all of my stripes and such on after the plane is hinged.