OC Sandblasting in Orange, Ca if they are still in business. I had my car bead blasted about 8 years ago and it had 5 or so different paint jobs on it. Back then it cost a cool $600. By the way, do not have the hood or deck lid bead blasted, they will warp.
They are still listed so maybe they are still there. I wonder if Don is there anymore...probably retired. He had just bought an original 63 Galaxie 427 in restorable condition when I had my car bead blasted.
They used a combo of walnut shells and beads by the way and it did warp the hood and deck lid. Hood was totally wasted but the deck lid was not too bad and I was able to reuse it. Hood was no big deal though, it was not in very good shape to begin with. Otherwise, they did a good job.
Be sure to get the major body work done right away and then get it sprayed with a catalized primer to protect the metal from rusting (or painted if that is how you're going to do it). I had the bottom and wheel wells blasted also and then primered. Later on, sprayed a good quality rubberized undercoat on them.
I decided to do my engine compartment, undercarriage and all suspension parts, under fenders, and trunk compartment, myself. I bought a sandblaster and did it
in parts. Doing the undercarriage was the longest part. I put the car on a lift, dropped plastic from the car sides to the floor and blasted everything in about 3 hours. All of it turned out very well. I was well pleased and the blaster paid for itself.
I'd do another if ever the opportunity came along.