Step 1: The planning stage.
Luckily, CPT Long is a good guy. He likes kids and quickly befriended my son when I brought The Boy to the office. With a tradition of pranks and jokes on and by the fire inspectors in the office, I felt comfortable decorating the shiny car parked out front of the Building Department. But how to do it in a non-destructive manner was the first puzzle.
Here you can see the wide expanse of panel that needs some "sprucing up". A nice little white ladder would be perfect! Conveniently located above is a luggage rack. Could a ladder be tied to this? Maybe two ladders, tied together and strung over the car like saddlebags.
For lettering, a static cling vinyl sign would be just the thing. All I need to do is find a sign maker that can do the work for a nominal fee.