don't think there was any rubberized undercoating back then, would have been an asphaltic material, applied on order at the dealer so on top paint, and the only place it'd be was under floor and inside fenders where it would been black - only way I've ever seen any
Bill
It clearly states in the factory assembly manual, of 1955-1959 truck manual, that "Under body protective coating (68 oz), apply to underside of of floor panel ...."
Note:Under coating must be 1/16" thick.
Because it was painted the trucks original color I am assuming it went down first.
