So much can be learned from this thread. Thanks for doing this and also updating it with the weathering of the wagons. I myself have had a go at making the scrap loads for the wagons and also the pipes. Turned out not to bad if I say so myself. This is my first foray into this kind of thing so a pat on your back is deserved. It has given me the confidence to give you weathering techniques a go as well !!
Thanks
Dave.