Well, since one of my BN Gp30s came in the mail, with parts to super detail it, I decided to go ahead and do it this morning.
Before:

After:



I brush painted all the detail parts Steam Power Black, it's a pretty close match.
After I started The project, I looked up a photo to figure out the location of a cable. Turns out both GP30s I had are ex-CB&Q units.
Also, I'm needing some longer shank couplers that the meduim shanks I have on it, since the gladhand scrapes on the plow, and so does the gladhand on a car it's coupled to.
As now now, it's waitng on a decoder and a anti-glare decal. (where the black spot on the nose is supposed to be.)
P.S. We need a head banging into wall smilie, and the camera needs to be tinkered with.