64-66 inner front fender splash pan question

So FABO crew,
I've got the 66 Barracuda apart and ready for the rotisserie. The bolt on parts are blasted and most are at the body shop being refinished as I type this.
Inner fender shields:
Mine were not original silver like the car but silver but a rattle can black from the original owner. Possibly why they are still in one piece and not rotted away. What color should they be from the factory? Body color, primer then undercoated, natural?

The ones that cover the door hinges are heavy surfaced rusted and little undercoating and the ones covering the back of the head lights are rattle can black. My car was silver and is going back that color.
Does any one know what was the original finish on the inner fender splash shields for the front fenders?

Thanks,
Joe