I've been rethinking this. Can I just use a regular polyurethane from a local hardware store? I'll have to set up a test piece of course, but I really think you are right. no matter if it does take some more money, and another day or two. I'd just do 3 or 4 coats, and sand to a shiny surface, right? I've seen this done on tables and bars with pictures, buttons, and bottle caps underneath, so it should be fine for cloth right? I'm not sure it wouldn't discolor or warp the cloth in the drying process. If I need to get epoxy resin for fiberglass, where would you recommend I find some?