I can get in on this one.

First up is an old Model Power E9A, with a few minor cosmetic alterations. The green paint on the first two locos is from Testors, while the yellow lettering and striping are SMP Accupaint. Both units were first painted yellow, then striped with masking tape and lettered with Letraset dry transfers. Next, the green paint was applied, then, as soon as it was dry to the touch, small bits of masking tape were daubed over the shells, removing the Letraset and revealing the yellow lettering.
And in company with the first loco, an E7B Phase II, kitbashed from two Model Power E7As. Most of the body panels are redone to get the appearance of thin sheet metal around the filter openings, both those cut into the carbody and those installed in former window locations. There is a "filter" installed behind each opening, and although not readily apparent from the photo, the upper carbody openings are see-through where appropriate. This one was built using prototype photos as a guide.
These two, also from Model Power, are my version of my favourite diesel, the FPA-4. Again, the side panels were reworked to get the proper batten spacing, and the air intake louvers near the top rear were scratchbuilt from styrene. The lower intake was built, then covered with stainless steel grill from Detail Associates, as were the balance of the upper carbody side openings. The rear part of the roof, with the cooling fan, was sliced off, then turned end-for-end, to get the proper placement, and the back end of the loco was rebuilt. On the front end, new number boards from Details West, a modified headlight and pilot, and some new louvers below the cab windows. The fuel tank was scratchbuilt from styrene and some detail parts from Detail Associates, and the icicle breakers on the roof were soldered together from brass bar, then pinned to the roof with brass wire. They were painted in a CNR-style freight scheme using SMP Accupaint, and the striping was done with SMP Accucals. The lettering is individually applied dry transfers from C-D-S.
Wayne