I think I'm getting better at sanding, because I managed to do the whole car last night. On the other hand, the closer you get to the end the better the panels are to begin with. I only have sand-through in a few spots, but I'll be reapplying at least one more coat of epoxy to everything, sanding with 400, sealing with a reduced epoxy and painting.
Also, I've decided to retire the cheap spray gun I bought as part of a three-gun kit last year. It leaks like crazy and the seals inside have completely disintegrated. The new one I picked up is cheap as well, but feels much smoother. I'm debating using the same one to spray the top coat, but I've learned that leaving things to chance often results in the worst case scenario!
I can't wait to get back to mechanical work.
Some new pics from last night.