Maybe my standards aren't as exacting as yours Dave, but I think with a little weathering my GP9s will look fine. I took one of my F3s to an N scale club and a couple people commented on how nice it looked. I think a little india ink will help the silver Santa Fe locos. Not sure what to do for the black widow Southern Pacifics. Maybe a wash made up of dark gray enamel and thinner. By the way, who are NWSL?