Right now, with some off time - I'm trying out Paint.NET.
I've got a plug in which will stretch images, and in this helmet the S didn't come out great. I recreated the front of the loco above the mask - and it turned out similar to Michigan's colors (which are similar to CSX).
This was a request and I hope it came out okay...
I also made a reverse of the helmet... I'm still learning this whole paint.net deal... I even added a light for the front of the helmet!