Your best bet would be to find someone that does sandblasting out of their own resto shop. I use a fellow for my blasting that uses river sand. You may get panels back with spots not blasted but at least they aren't warped. HE knows when to stop. You can also razor knife off the finish and use a 7" featheredge sander for the rest. If you want some help or advice, feel free to email me at slammedbus@hotmail.com. I am currently looking for my father's 68 vertible (pipe dream I know)
As for "the plan". I always tell my customers. Sit down and decide "what do I want to do with my car?" Drive it, race it, show it? From there it is much easier to decide on a path to rejuvenation.
