Although it never gets really cold here in Northern California (the hair in my nostrils isn't frozen), for about 3 months it's too chilly or too rainy to use the airbrush in the garage, so I rely on rattle cans this time of year. My favorite for some cdl tones is Model Master Modern Desert Sand. For lighter or darker shades, I use Aviattic cdl decals over a white base coat.
Hope this helps.
Cheers,
Bud