I David I spent many weeks some years ago working on Waverley as a volunteer and the Iroko when new is a gingery mud brown colour which appeers dark when new. It soon weathers down to a much paler straw grey culour due to salt and constant washing with FRESH water every couple of days. When in service it looks a bit like dirty oak. Remember, when we are painting models we are looking at a subject which is many yards away and distance in scale tends to lighten everything. So trying to emulate the "full size colour makes the model look darker than it shoud, So I always tend to lighten things like decks and horizontal areas. Look at particularly small models where the builders have copied the exact colour match and they are all several shades too dark! Regards, Walter.