there is a fiberglass specific paint stripper at the home centers. Klean strip was the one I used. brush it on, the paint bubbled up, and scraped it off with a fiberglass spreader. you will need to sand a bit after that, but it really knocked out the lionshare of the paint. I was concerned about it "softening" the glass, but no problems there either. this was on a 7 plus year old starfire.