SSW and UP weathering - Please comment

[nachoman]

Looks convincing to me, especially the first one. Keep in mind the SP had some VERY grungy looking locomotives in the 1980s and 1990s. The paint would be faded out, rusty, grimy, and sooty. I saw many locomotives that appeared a if they had been through a fire. In many cases, the lettering was almost impossible to read. I don't know why the SP was especially bad for having weathered locomotives - whether it was they used cheap paint, or painted/washed them less frequently. The locomotives you weathered are very nicely done, but by SP standards, they would be "clean".