Caustic soda for me. The frame is a repainter anyway with the crack repair. Hacksawing it out is a horrible job.
Agreed. Caustic soda is nasty stuff but quick and easy if you need to repaint anyway.
If there is a remote possibility that you won't repaint, give it a few days with a combination of Ammonia and the quill stem method as no damage caused. That's my preferred method, although decent strength Ammonia is getting harder to come by these days.
Bikes: '92 Alpinestars AL Mega DX, '93 Cannondale M2000, '94 GT Zaskar, '90 Saracen Tufftrax (Pink!), '9? Raleigh RSP Team Edition 853
Projects: '89 Muddy Fox Courier Comp , '93 Raleigh Apex, '92 Cannondale M2000, '91 Scott Boulder, '87 Raleigh Ozark, '89 Raleigh Avanti, '87/88(?) Marin Palisades Trail, '91/92 Saracen Conquest E Stay, Unknown Saracen (1994?) Frame...