I second that motion on the Citrustrip. I've worked in the painting business a bit over the years and have used some pretty knarly chemicals to remove poly finishes. Citrustrip gets the job done just as well, is affordable, and is much safer and less toxic. Say goodbye to methylene choride and keytone. Buy the Citrustrip and just make sure you let it sit long enough (follow directions on can). I recently stripped a 25 year old stock and the finish came off with a gentle scraping from a plastic putty knife. The whole process took 1.5 hours. I like the spray can option for small jobs. You should still wear heavy rubber gloves for the job.