I would stick with the original, because thats what the truck has. Beyond that, there may be a trademark issue if you want to use the bottle cap logo. If that is a registered trademark, you should get permission from the owner to use it. Although realistically speaking, probably the owner wouldn't care if you gave them some free advertising. But that can be a sticky matter, because it becomes unclear in the public view who has liability for the truck if it is involved in any legal issue. Unless you are perfectly clear with trademark issues, stay away from copyright and trademark matters on signage. Basically, that means not using anyone's logo that has been used in public to identify a product. But if you really want proper advice, you need to talk to a copyright/trademark attorney.
All this isn't meant to rain on your parade, but most sign painters won't paint someone's logo anywhere unless the customer (the payor) has permission to use/display it.
Harvester
