Well, being a certified old fart, I did work at Dodge Main back in 76 painting Volare and Aspen radiator core supports. I don’t believe it was much different from the Cuda / Challenger era. It’s pretty much like what most people are saying, the application varied from person to person. Myself, I pretty much painted every core support black, unless it was black. Did the dark green, dark browns and of course any medium to light color. I usually filled in for guys that called in sick. There was no engineering spec, just some guy painting the body took a smoke break and said "kid do it like this". Darn, that reply reminds me of how old I am and makes want to take a nap now. See ya, Snowdoggie.