One of the requests for the WD Barclay refurb was that the loco should emerge in green.
Which green wasn't specified but I assume that Army green. As it happens, I had a couple of the excellent new Airfix QL lorries to hand also in need of paint. According to Airfix, the green is No. 159.
Using a fresh tinlet, I sprayed the lorries and then the loco. Colourwise, I think the shade on the lid is lighter than that on the model but not by much.
On the loco, I feel that the results look a bit dead so a coat of satin varnish will be required. Maybe a dead matt finish may be technically right, but it looks wrong. My suspicion is that it won't survive handling as well without varnish either.
The lorries - they can stay matt.