The C&O streamlined L-1 Hudsons were originally painted orange, but rather quickly were repainted yellow, which is what you see in most color pictures. I was curious what the orange looked like, and when I found a color picture of one of the C&O turbines to give me a color reference, it didn't take very long to go from this
Like many, I feel that this definitely looks better. I also wondered what these engines might have looked like if they had lasted into the tri-color era:
This is not an improvement, in my opinion.
I also knew that the J-3a Greenbriers were originally ordered with streamlining, but that was canceled before they were delivered. Again, I wondered what they might have looked like:
Obviously, this picture was taken after they had been bumped from the passenger trains into freight service. Again, what if these engines had lasted into the tri-color era?
In the late '40s, Allegheny #1642 exploded. What if, when they rebuilt it, they decided to streamline it too: