The coupler boxes have now been painted and installed on the cars. My local hobby shop did not carry any colors that were matches to the car ATSF and BN colors. I took some colors I think will do once the boxes have been weathered. Coupler box colors are not always the same as the car, and if they are tend to be rather rusty and dirty anyway.
Instead of starting on the weathering I could not resist first trying to create a cut lever and test it out. I bent some music wire according to the instructions that came with the Protocraft couplers. Here is a short video.