I just found a "media blaster" right down the street from my place. He uses sand, but it looks like powder. He said after he sandblasts, he will prime the metal for free (you pay for materials only).
Tomorrow morning I am taking the trunk lid down to his shop, where he said he would do it for free, so I can see the work he does. He uses some kind of off-white color, polyester primer.
If it works out, I might end up removing the motor/transmission and have him do the entire car. The doors, hood, trunk, fenders, glass, and interior are already stripped anyway. There are all kinds of rusty nooks and crannies, inside and out. No time like the present.
P.S. I did not expect to find someone that does this type of work closer than a 1000 miles from here. Reminds me of the abandoned, paved drag strip (1/8 mile) with concrete starting pad, I found here only a mile from my place (in the middle of the Baja Desert, but with a view of the city below). How lucky can an old-school bracket racer get?
video of unofficial drag racing: