Working trucks will accumulate a patina of worn paint, scratches, and rust that follow patterns based on the interaction of the surface with repeated human contact. And then there are the random dents. As in this example, often the hard chrome plating is the last surface to begin to breakdown, save the glass.
I found this truck early one morning, and was enthralled by the transparency of its paint. I haven't bothered trying to figure out if the truck was originally blue or orange, but its the pattern of wear and the borders between the two colors that I found just beautiful.