Dead Rising 2 | Blue | Green | Purple | Red | USA | Dead Rising 3 |
The blue spray paint is a weapon in Dead Rising 2 and Dead Rising 2: Off the Record.
It can be used to paint Chuck's dirtbike, creating the Blue Thunder. It, like any other spray paint, can be combined with a pylon to create the Air Horn. On a stunned looter that has previously looted the player, pressing the "use" key on them with an empty slot will allow you to prompty loot them, giving you your cash and item back. It can also be used to vandalize Zombrex posters around Fortune City for the Improper Behavior achievement.
A reliable place to find blue spray paint is in The American Historium in the Americana Casino.