James, are you familiar with shrinking discs? I’ve had four. I bought the first one 20 or so years ago by Sunchaser Tools then when it cracked bought the second by Eastwood and I more recently (ie four years ago) bought the combo from Wray Schelin - just as effective as the others but much safer and less prone to failure. I have yet to meet a dent I couldn’t remove or oil canning I couldn’t flatten with a shrinking disc, provided there’s access to both sides of the panel. Seems to me straightening a coupe roof is an ideal application. No affliliation.
Edit. Very nice work, Larry.