Hi, this is the first time I've tried to remove canvas from a canoe. According to the books I have, it should essentially fall off the hull once you remove the stem stacks. Not the case with this 1966 Otca. It seems to have been put on with adhesive. When I try to pull it off, planking peels away. Ack! This is definitely a canvas cover, not fiberglass. It's like the filler (white stuff) soaked through the canvas and bonded to the wood. Maybe it's paint? Yikes! I haven't tried a heat gun yet; that will be my first option. Any other ideas? Thanks!