Hes saying when you heat the glue it will loosen and basically come right up. Dont go too crazy, er on the safe side. The paint scrapper will help you kind of pry it off your board but again, be careful. Keep googling too I bet theres a lot of different ways to do it.
hot- boiling - water is better then hair dryer- less chance of ruining your fiberglass.... use a heavy plastic (not metal) paint scraper - rip it off and goo gone it for a while... don't use any solvents unless you want to ruin it