Back in the 1980's I built a semi-trailer cab only (the kit didn't come with a trailer). I don't remember much about the kit, but I'm pretty sure it was a Kenworth and looked something like this:* I remember painting it blue as well, but mine was an even blue all over. I usually painted my kits as per the painting suggestion in the box.
I most often bought either Revell or Airfix kits at the time, but that's not to say that it was some other brand.
Does anyone know what kit it was?