Spray painting, or rattle canning, is nothing new. Some people use spray cans to apply primer to a vehicle before new paint. But this looked funny to KPD
Years ago, I actually rattle canned an old Chevy truck I had, from blue to grey. It was primer, after having sanded it. It took a while, but when done, it pretty much looked grey. In this case, a truck thief apparently didn't realize white over green paint requires more than one quickie coat.