No, I'm not connected other than as a customer. Back cover, April, July, November and December all have one or more examples of the green and gold paint. Pieter You wrote. I have spent year's putting together the paint formulas with others for the New Haven RR, the chip book is the net result of that. There is a lengthy dissertation in the forward about all the effects natural causes can have on paint including local.
Photos are notoriously inaccurate as explained in the forward.
If you want to model fresh out of the paint shop at ALCO or a New Haven inhouse repaint then use the book. Some people do not care for weathering of any sort. Green bodied units. Gold even by the RR as it was yellow. Gold is very dark and rich.