well - a combination of things is working - the duct tape thing didn't
work, but I ended up scoring the label and I resprayed with goo-gone
and left it in the sun.
Lo and behold - lifting along the score line. It worked! I've kept at it
now and I'd down to the last little bits. Not too worried about the few
scratches I added along the way. I will still be able to see what's inside.

C