Airbrushing aid

I wanted to be able to airbrush models without getting paint all over my turntable, so I dreamt up this design. The rails across the top are set at 32 mm and 16.5 mm to cater for O gauge and OO/HO gauge wagons for airbrushing/weathering. Also able to cater for my 1/100 scale tanks and other similiar sized projects.