I did mine this way for most of it (underneath) although I did use a sand blaster for some areas.
A few things to note a) sand (i used crushed glass) and dust will get every where even with plastic sheeting b) you need a big compressor (5hp min) and a pot blaster that actually works. c) you will use 100s of pounds of media
I recommend using a combination of wire wheel, blasting, chemical stripper and abrasive disc (3M Clean and Strip XT) for doing a car. If I wasn't so cheap I would send it out and get it done or get it chemically stripped but no one around here does it anyway.