When it comes to models of modern engines, what paint schemes are left? A couple I can think of are the Canadian Pacific, and Union Pacific Olympics commemorative engines (I'm guessing copyright/trademark issues with them). Also on the Union Pacific, the Operation Lifesaver AC4400s, and the ES44AC in the original Building America paint scheme (the one where the shield is between the flag and the radiator fins). On CSX, the AC6000s in the YN2 with the blue lettering. I think there was only 2 or 3 in that paint scheme. There's the BNSF, and KCS anniversary units. I forget what CP heritage and military units have been announced. The CN heritage units. So what other paint schemes haven't been done yet?
A couple of parameters. Let's keep it limited to the SD40 (since they along with other SDs are being rebuilt), and the Dash 8 through today. And to engines we already have tooling for.
Bill