The weathering was several stages, trial and error Dirk... I had some basic guidance and some key pointers from the guys here, all throughout this Build, and its documented in my Build Thread... I know its long but go back a couple pages from the end and u'll see how I did the weathering...
But, the pic below are the washes I used, several coatings at various times... Also used a flat/matte coating to dull and dust everything up in the end.... Let me tell u, it was rather fun trying to get it as real as possible....