Got back to my own PC now, and well none of the pictures of my own stock seem to do them justice (?) so here's one of the TPO in the NRM at York.
Oh and just found an old photo (about 20 years ago) of a trial paint job on a Trevor Charlton etched zinc body, this, I think, shows the sort of primary colour of the white..... Like all things, daylight, tungsten, florescence and now Leds will show up different colours when viewed under anything but the light you painted it in. This shows my method, Purple first to the bottom panels, then the white to the top, then the lining, and finaly putting in the thin purple lines on the beading etc. In 4mm I don't do the white lines to the carriage end and door edges, Larry's a lot better than me, he can do it.... and do it very well.
PS - this etched coach was a test piece for paint density, lining bow pens etc, it certainly wouldn't win any prizes bar the wooden spoon.
Penlan