Discovery's Mythbusters draw the Mona Lisa in 80 Nanoseconds

[Steve-SKO]

 

[Griff-SKO]

Hm-m-m-m. . .Instant bus mural anyone? 8)

 

[Steve-SKO]

You could create a drive through muralist, you drive into it like a car wash select what you want painted on and in it loads the balls and shoots it onto the vehicle.