I need some advice on how to weather a bridge. I purchased the Vollmer Arch Bridge and sprayed the whole thing Polly Scale Grimey Black. I would like to know what I should be doing next. I have a book called "How To Build Realistic Model Railway Scenery" By Frary, but it only goes into details on weathering rock formations and stuff like that. It has no details on weathering structures. I bought the Polly Scale Weathering pack which Im hoping will contain all the necessary colours to do the job. I had to order them from 1000 miles away. Ive only found one place in the whole of Australia so far that stocks Polly Scale paints.... If anyone from Aus is reading this and they know of some places that stock it, please let me know. Anyway, the colours I have on hand without doing another mail order are as follows... Reefer White, Earth, Roof Brown, Rust, Rail Tie Brown, Aged White, Mud, Dirt, Aged Concrete, New Gravel Gray. Thanks for any help you guys can offer, Troy.