[LS short box]

I've done a few "frame off" restos and I've had good luck with removing all the old paint with air craft paint stripper on the big panels but staying away from all seams and edges. Then I use a DA sander and fiber disc on right angle die grinder to take off the rest. Around the edges I use my 30 pound pressure sand blaster. Parts like the door pillars and around the window openings.
I would be very nervous about anyone using a high pressure commercial grade sand blaster on any of the large panels.