I've just stumbled across this thread.
Weathering can be one of the most subjective parts of our hobby but I think what you've done is both well done and fits with my take on how weathered stock for a layout should look.
I've just acquired some RHTT wagons - should be an interesting weathering project - when I get round to it.. I'm filing reference pictures at the moment..
I also very much like your 60....
Chris Hopper