Factory Primer Color

My 1970 Swinger 340 (Windsor Ontario built) was dipped in a black coating about 22" up and then a red oxide primer was applied over the outer body (over the bare metal) and then a green sealer was sprayed over that followed by the EV2 paint. Under my car was the black from the dipping process and covered in EV2 overspray. I read somewhere that after the dipping process the outer body was hosed down to remove it from the outer panels before the primer was applied. When I scraped the undercoating off my wheel well tubs and inner fenders it had the green sealer and EV2 paint under the the factory undercoat.