Thanks guys. After looking at the film and pausing it quite a bit and collecting stills, the Falcon of RW looks like most of the weathering is sun bleached faded paint and alot of red Australian dust and dirt on it, with a little rust and some dings here and there but not a total junked out heap. So thats the look I am going for. Of course the trick is not to over do it with any weathering.
The nice thing about the Falcon XB is even in its dusty modified condition, it still looks mean and fast. I hated to see it get blown up, but I am looking forward to seeing it run across the desert again in Fury Road.