I always like to see plain dark yellow vehicles. They’re tough to do well… excellent work on the paint tones and patina. I also like the nice mottle scheme on the 251, good airbrush control!
If I was to critique anything it would be that the dark chipping is a little heavy handed in my opinion. I like to see chips and scratches because it’s realistic but they’re also very easy to overdo. But again, that’s only my personal opinion. You’ve done an excellent job overall.