Sometime ago I bought a Walthers Cornerstone Intermodal Crane kit. The crane was quite large, with a width of three tracks or trucks. I decided to make my version less wide, and cut and removed about a third of each girder.
I also substituted the walkways and ladders, with parts from various other manufacturers. This because I found the original parts to be a little on the heavy side. I spray painted the crane parts yellow before assembly. The walkways and ladders were brush painted grey after everything was glued together.
The photos below show how my crane turned out, after painting, decaling and weathering.