The rocker cover on my MK3 was gold, then had army olive drab over that.
The engine sump was red.
The block and head were a sort of faded olive drab, but it's not the same paint as on the body. It's much harder wearing.

The bellhousing, gearbox, transfer case and winch were the dark green of the earlier era vehicles, with several coats of the more recent olive drab over the top. Usually over layers of mud and grease too.
Greg.