After much explaining and the manager backing our story up, everyone, including the owner of the bright red Ford pickup had a good laugh.
There used to be a comment on Airnav for KBBW that Brown Reliant K outside with the keys in it is NOT the courtesy car but the owner was good natured about it's absence.
My mechanic hopped into one of these small town airports and found a car with keys in it that like many airport courtesy cars out west was an old police car with the jurisdictions logos peeled off it. When he brought it back he found out that it was a REAL police car that the local department had just bought from another department and they hadn't even had a chance to drive it yet.