I've received a newsletter from MTL reporting an error in painting for the recently released Union Pacific passenger runner packs. The gray roof, ends and undercarriage were mistakenly painted silver. MTL has offered to correct this. Details at:
I find the error rather obvious as compared to the earlier released UP units.
I'm also impressed with MTL for offers to correct this no-cost. I don't recall a model RR manufacturer being this generous in correcting a cosmetic issue before.
Gee, I though the earlier comments here of gray vs. silver had to do with hair color.