I’ve been trying to get clean resin lines around my fiberglass patches by taping the perimeter with blue painter’s tape.
When I try to lift the painter’s tape after the resin has cured, however, there’s a tendency for the entire resin sheet to lift as well, unless the painter’s tape rips first. I messed up a major repair somewhat by getting air under my patch so that I had to patch the patch.
After that mistake, I tried using a utility knife to cut the resin along the painter’s tape edge, but that is difficult to do and easily gouges the boat.
I could lift the tape before the resin is cured but that implies lifting the peel ply that sits on top first without leaving an uncured mess on the patch.
Any tips or tricks?