The rubrail on my 1982 Capri needs to be replaced as it has broken off in several places. I have purchased some new rubrail from the Catalina factory and it's fairly self explanatory how it goes on. However, I cannot figure out a good way to get the old rubrail off. I'm guessing there's some adhesive used to hold the bottom lip of the rubrail in the groove on the boat. Is there a safe solvent I can use to loosen the adhesive so I can remove the rubrail without completely destroying the fiberglass?