On further (on the clock) consideration, I also think you may want to soot up around the exhaust a bit.
Maybe also darken the radiator grills some too to give them depth. The Kato chickenwire grills just don't have as much innate depth as their Atlas counterparts, but with some black paint tend to look just fine.
I'd also add those detail parts I talked about elsewhere. It just looks naked without the cab signal box N502 from Sunrise (if you can find it, and when you do, tell me where).
It also needs a plow. I did one with and one without, but by and large they all had them at one point or another, and it just makes it look more dressed up.
Did you do this one from one of the new Kato runs or the older ones?
I really like the way the blue has weathered up. It's got a great patina too.
I'm not really in love with these photos, but they show the grill job well:
