I know it's very common for hot rods to have their firewalls painted white (or off white), regardless of the color of the car itself. It appears to span several generations of hot rods over many years....not just a short lived fad. I've always wondered the origins of this styling feature as I've seen it on early post-war cars through late '60s show cars. My best guess is that it was done by hot rodders to give a nice contrasting backdrop to show off their fancy motors, but that's purely a guess. Can anyone with more knowledge of hot rodding history chime in and show me the light? How did white firewalls get started?