Paint stripper IS bad advice! Truthfully, I have used it in extraordinary conditions, where there were multiple layers of very thick or gummy finishes...but largely only on the faces of the glass and only leaving it on for seconds before steel wooling or scraping it off. Once it softens a bit, you can scrape most of the old finish off with a sharp knife or cabinet scraper. Sounds harsh, but really not so much. Don't go too deep with anything, and the right choices in sandpaper grits will take you down to the right surface for refinish. I use 1000-1200-1500-2000 grit wet-or-dry paper for the last surface prep.
However this all sounds, I prefer not to ever use chemicals to remove finish, relying on mechanical means instead.