In the 15 years that I've been turning, I've never had a chuck or faceplate stuck on the spindle. Today, it happened twice. The first time was with a steel faceplate. The area of the faceplate that houses the threads is wide enough so that I could get a pipe wrench on it and break it free. I next used an aluminum faceplate and have been unsuccessful in getting it off. On this one, there isn't enough room to get a pipe wrench on it. I've sprayed Blaster at the faceplate-headstock junction, and at the other end where the spindle shows. After a brief time I tried with pliers that adjusted wide enough; no success. I then tried heating the faceplate; again, no luck. Any suggestions as to what to do next? What should I do to prevent it in the future? Thanks.