Why would he sell the truck with his company name painted on the side? Did the dealership charge him to paint over it (by reducing the resale value) and was that documented in the sales contract?
I would never sell a vehicle with my company’s name on it. Even if it doesn’t go to terrorists, it could just go to some local jerk who would spread a lot of bad will by driving rudely.
I might not have a problem, because my company name is "I KEEL YOU, INFIDELS! Inc."