The door is now skinned. It didn't go the way I had planned, but it's on and it looks decent.
I intended to oxy-acetylene weld the skin, and to practice, I cut a piece of scrap 12" long in half, tacked it, planished it, and welded it together. Then cut it in half again in another spot, did it again. And again. I felt confident.
But oxy-acetylene had other ideas.
I tried and tried to make it submit, and finally - I snapped (Lose it. Heater. Smoker. Flurry to the solar plexus. The torch tip goes for it. I gave him so many lefts he was begging for a right.Uppercut. Jab. Roundhouse kick to the face. He's lying there in a puddle of his own excrement. I says "How's that?"), and MIG welded the skin on. It worked out fine.
I do not have the metalworking skills to work the metal into perfection. And the more I try, the less patience I have for it. I -am- however, plenty good at filler.
At any rate, here's the skin, installed: