I'm going to start weathering the lower parts and chassis of the super detailed Williams cab forward before the piping and more intricate detail goes on. I want it to look like it would a few months after being shopped. The color pictures and video I've reviewed seem to indicate the unclad firebox portion, shields and under firebox box take on a muddy brown and rust appearance. The running gear begins to fade from dirt blasting and takes on the color of the local dust, as well as, grease and oil mixing with the dirt and oil smoke in appropriate spots, but overall still remains black as opposed to gray and dirt colored. The siderods remain pretty clean, but have oil and dirt collecting in the ribs The smoke box remains darkly stained with just an undertone of rust coming through. Calcium deposits are beginning to form where steam or water escapes. the engine still has some shine, but overall is moving towards inevitable external element degradation. This is what I'm seeing, but also color film of the era doesn't always represent the subtle colors well.
I would really appreciate any help.
Thanks,
Ron H