Back in from working on my D150 had to weld up holes from 3 different sets of mirrors. Started working the sheet metal on drivers side door and ended up stretching the skin. Broke out the torch and started shrinking half the dang door. One step forward two steps back.
Big flat panels, a royal pain. Make it kustom has a good video on shrinking a dent in a flat panel. Watched him dent and shrink a panel in person, pretty neat.