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.