Of course there'll be a couple of logos on the car. Suggestion for main logo on the hood: The Peace Dove by Pablo Picasso.
Everyone who enters the vessel (incl. all outside-car activities connected to this project) will have to sign and follow the bord rules. Suggested:
It would be a very beneficial twist of the story, if the car could change its owner, for instance during one of the stops suggested for the Netherlands.
As some important partners of the journey will surely be found in NL, it is not completely impossible that this could come real.
It still might be necessary and helpful to have some "compliments" on board to help saving time crossing borders. Some of these little gifts will have to be bought a couple of borders before...