Here are some preliminary shots while the car was still wet. That hot water worked well on the 40 year old undercoating. I definitely was a smart idea to get a full face shield. When the 3000 psi hot water hits the undercoating it tends to blow it off in chunks that fly back at you. The black you see on the frame rails is the original black overspray, though it looks kind of grey when wet.
The undercoating came off the tank nicely to reveal the original date stencil.
Original vapor cannister hoses in place (unclamped as originally installed at the factory)