Des - at least one Bandon tank was painted green, can't recall number off the top'o'me'ead... but - if is that one, it could be a combination of a dirty green loco and a colour-compromised slide. The tale will be told by wther it has lining like "Maedb" in Cultra - if it has, the thing is green underneath it all - but the standard CIE shade (again, as on "Maedb"). If no lining, it's grey for sure, as no green engines were ever UNlined, and no grey ones were ever lined. Of the handful painted black, a single Woolwich got red lining for the Rosslare Express, as per the Bachmann model.
Glenderg - yes, that description is spot on. To see it in the flesh, the DCDR has been able to ascertain exact shade, and this is currently applied to two ex-GSWR coaches there (836 and 1097). It won't be long until it will also be applied to six wheeler no. 69 there. The LMS-style maroon was first applied to the "steels" (Bredin 1935 stock) and the seconf batch of Drumm trains. I got that info from Senior, who saw it all happen, so that bit's first hand...
There is some evidence that coaches painted in Limerick may initially appeared somewhet browner for some reason. Don't forget too that the GSR painted some main line stock brown and cream lined in black from the late 20s to about 1934. This, actually, is something I've yet to see in a model, but it was never applied to steel sided stock, only older wooden stock used on main routes. The Achill branch had a regular coach towards its end still in this livery, and quite fresh looking too, as late as 1934 - bogie compo 179M.