Cheers gents.
Jurgen the satin varnish just made sense, need to sort some track out next. H/OO fits just inside the wheels but only just, all my track is curved so will need to pick up soem straights from ebay I guess.
Trev flags are a must I think to add some colour, drama and glamour, interchangable ones are best but with three locomotives to do I felt I could glue mine in place. I plan a plain unarmoured loco and carriage with no flags for generic use and then the last loco a bit more fully armoured and looking slightly less improvised with red flags, that last is on the back burner at present.