Has anyone ever seen canvas (I assume it's canvas) held in place with some type of sticky goo? A fella just brought me a leaky 15' Peterborough 'canvassed' with this stuff. I need to get off so I can canvas it properly, but the goo is sticking to both the canvas and cedar quite well. There are no wrinkles in the canvas - it appears from the outside like a normal filled canvas. So I'm guessing that the canvas was purchased with the goo already attached, that is was 'stretched' like traditional canvas, and as a last step heat was used to melt the goo to secure it to the hull. Also, I believe the canvas wasn't 'filled' and seems to be rotting away, which no doubt explains why it's leaking. I'm finding that by using a heat gun with a pair of pliers I'm able to rip off sections, but it's slow going. Anybody know what this stuff is? And can anyone recommend a better way to remove it?