: Is there a time line for this technique...is it still effective a month after
: the lay up, or must one get to the heat gun thing before the epoxy has a
: chance to cure?

No time limit that I have seen. After years of neglect (sitting in the sun and snow, with no varnishing, or upkeep) the outside of my canoe was pretty ugly. I made it in 1994) I peeled the glass off last year (12-year-old glass job) and it is waiting for me to put on a layer of Dynel instead. Figured I'd try that. Inside glass was fine, so that stays. Gunwales of varnished red oak rotted. and will be replaced with pine or cedar, sealed in epoxy.

Heat an area and while it is warm you slide a wide putty knife along the hull. separating the glas and resin in wide strips.

What surprised me the most was how thick the glass on the bottom of the hull (2 layers of 6 ounce cloth) really was. I won't go that thick again. The river by my house is shallow with lots of sharp-edged rocks. Scrapes and dings affected the varnish and resin on top of the glass. Nothing significant went through the outer layer of glass, much less penetrating both layers. I got leaks from areas where the glass was not well coated with resin. Water that got in those pinholes caused more damage during storage than I encountered during paddling.

PGJ