Have one kicking about somewhere that I repainted with pretty much the same idea of modelling a preserved railway as you. gave it an all over coat of crimson on the body frames and wheels with black running plates, handrails, chimney ect. painting the frames and wheels really helps them look the part. name plates are good to, theres a few that have been named after entering preservation. most of them have been vacume fitted and some steam heat fitted since which they dont have normaly if they are purely industrial ones.