Had a look at some of those on their site, they have O gauge and even gauge 1 samples! Due to the panelled nature of MGWR coaches I'd hazard a guess that it is nigh impossible to improve the surface texture much due to raised panels, etc, and MGWR wagons are difficult to do a crisp paint job on for the same reasons. Hand brushing does not yield good results especially lining the raised panels.If they were available in Shapeways FUD material (ie like Neil's 42ft container flats), I'd be tempted but WSF material not great for raised precision surface detail (toothpaste effect). Brass commissions seem the only viable option for decent models of MGWR 6 wheel coaches..