There is more to it than that for the riveters. I saw a pic of a brand new B-17 straight out of assembly and the O.D. shades were different depending on wether it was a paint or a dope or a laquer, all three being used for different parts. I hold to the truism, if it looks, sounds and walks like a duck then it is a duck! So if your chevy looks like a chevy that's good enough for me.