Dongray Have had some shrinking lessons from the lead bodyman of old. I once had an oilcan panel he went and got a FLAT round body hammer ,it was not well-used but he did say it had to be flat. He heated up a spot about like a silver dollar-it just puckered right up and he dollied it from behind and hammered it FLAT 2 more times of that and that panel was streched tight. Scuffed it primed it blocked and painted looked fine !
