Hey Warren, welcome to the WW&F forum.
What era are you shooting for? I presume it's some time during either the Blount, Richardson, or Bartholomew eras.
Both locos stayed pretty consistent in black (as opposed to the post-Atwood pre-Blount cavalcade of colors) but there are several little details that changed over the years, mostly having to do with some details in the paint.
Obviously you need to have brass bands no matter what of those 3 eras you're going for.
The lettering\numbering seems to go through a lot of changes from the 60s until it stabilizes in the late 70s based on what pictures I have and have seen.
Sometimes the domes were lined, others they were basic black, the smokeboxes were any number of colors from (off) white to gray/silver to black.
One thing that I think was pretty consistent was that the rods and the cowcatchers (and probably the wheel tires but is hard to see on the Baldwins, the Monson's had it) were painted in what I refer to as "primer gray", which was this slivery, very thin paint that I remember having to put on the rods\tires of #4 back in my early MNG days.
The cab windows should say "F. H. Richardson" and "F. N. Blount" on the window sash also. Sometimes the window frames themselves were red, but most of the time they were black.
There's a couple groups on FB that you can go to for research material too. The Edaville good old days (or however it's called now) and Maine Two Footers groups can provide some assistance.
Couple good pics on nerails that might help, probably a bunch that I missed there or that others can point you to:
http://photos.nerail.org/showpic/?photo=2022042914581520526.jpg&order=byrail&page=2&key=265&photoindex=3&maxpage=77&maxphotoindex=3&key2=http://photos.nerail.org/showpic/?photo=2022050810150912359.jpg&order=byrail&page=1&key=265&photoindex=2&maxpage=77&maxphotoindex=3&key2=http://photos.nerail.org/showpic/?photo=2003050118402010224.jpg&order=byrail&page=72&key=265&photoindex=2&maxpage=77&maxphotoindex=3&key2=
