So I am working on a Ranger canoe trying to get a patch on a long crack. What someone did is cover it with 4 mil plastic and then taped that down with Gorilla Tape. I got most of it off but there is a layer of residue where it was. I tried to scrape it off with a razor blade but it just kind of spread. I tried using a hair dryer to heat it but that didn't work. I even tried a blow torch and razor blade, don't ever try that! Someone suggested vegetable oil. My better half is good with letting me bring it in the house as my shed is unheated and winter is here but to bring it in means at least a day plus to do it and my house just ain't that big!
Any ideas, suggestions on how to get this stuff off so I can move forward with the fixes? Many thanks!