If you arn't planing on releasing the item, you can reskin anything pretty much. If you plan on releasing though, you need to ask premission. Also for the nose, actually, you might want to adjust the red and make it slightly darker. Santa Fe loved their red, but seeing the Super fleet when they were brand new, the red wasn't a fire truck red, but it wasn't really "CP red" or Cherry red either. Either way, looks good though.
Weird thing on the red color, the RGB codes for Santa Fe Red comes out a lighter shade of red, almost a pink color to my eyes. I like the deeper red colors, that I think look more correct. There is a GE unit that I see on and off, that the red has faded a lot, but is still darker than the RGB chart I got off the web.