Back when the Road Runners were first produced, there were a lot of those custom painted plates available, until WB started enforcing their copyright. After about 1970, the painted, noncopyrighted versions of the RR birds were pretty hard to come by. Some air brushed stuff was still done at car shows and such, but otherwise, not so much.

I suspect the plate in the picture was something produced before WB clamped down. Its nearly rusted away because no one back then thought any of this stuff would be worth anything in 20+ years. The back side was probably never painted. Gene