My first learning curve with building trucks....
For 16 years I have been building cars....the kit frames are all 1 piece...trucks, a different animal all together as I have come to find out. I have jigs for the different stock car frames/chassis that I scratch built...looks like I have to do the same with truck frames and build 1 or 2 or 3 or....... I have a magnetic base that I used to get this frame square, even with that base it still took patience and time.
I first shot the inside portions of the frame including cross members with a Matte Black to replicate what color it would have been coming out of the factory. The outside portions are Model Car World Seafoam Turquoise Metallic shot with an air brush to give it the appearance that custom colors where applied after leaving the factory but prior to being placed in service.