Richard,
The Scale Coat Paint Brand number 45 (GN Empire Builder Green or Great Northen Green) is a very good color. It's a good deep green that is a pretty good match to D&RGW Green they used on the passenger car fleet.
It also goes on with a good semi gloss - gloss finish and looks like a good peice of RR Varnish before weathering.
I think other on this board will agree with the Scale Coat Number 45.
Kevin Cook