How To Remove Epoxy From Glass. The paint stripper should start softening the glue, which lets you scrape it. Use the heat gun to soften the fiberglass and resin layer.
The saturated rag can also be used to scrape epoxy. If you don’t have any glass cleaner, you can use a 50/50 mixture of vinegar and water. On large areas, use a utility knife to score the glass and remove the epoxied fiberglass cloth in narrower strips.