The safest way to strip a frame is to chemically strip the paint, then use a soft media like walnut shells or plastic to blast it. Using a media and pressure that takes "about 5 minutes" can be harmful to the frame, and can only be done so many times. Also the finish will not look as good using more abrasive medias. If it's something you care about, be as gentle as you can. The cost should not be much more for the prep alone.
-Chip