turbo buicks without udercoating?

mybuick

intercooled engines rule!
Joined
Jul 21, 2002
what color if any would be under the car if there was no undercoating?
 
Frame will a blackish gray waxy stuff. Body will be a poorly sprayed version of the body color.
 
Frames were coated with cosmolene to prevent rust. I dont think there was a color to it but after a few miles color develops from roads and such.
 
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