I made some fibreglass angles using an aluminium angle extrusion as a mold. I coated the aluminium with a smear of pva release agent. Then wrapped a layer of peel ply using a light dusting of 3M77. Then 2 layers of fiberglass and a final layer of peel ply all held with a bit of 3M77. I infused with some low viscosity, slow (4hr) set epoxy. Everything looked excellent the following morning, about 12 hours after the infusion and I started to de-bag. I discovered the resin was still a bit sticky so I decided to put the lot out in the sun for a few hours.. I came back about 2 hours later to discover the laminate stack had "inflated" off the aluminium extrusion mold about 3mm and formed curved cross sections rather than nice square angles.. Scrap..