We're talking rolling refrigerators! Not the other thing. I gave that stuff up in 1984. Didn't do me any good and I preferred to spend my spare cash on model trains.
I just completed 4 Sunshine reefer kits for a client, and I have 5 more to build for him. Nice variety.
The cars were weathered with a combination of washes, sprays and Pan Pastels. My new favorite weathering medium. Get some and try it.