Jeremy - Is it dusty or does it just look dusty?
I would add coats of POR on every possible part that is unseen - inside the fenders, under the car etc - Right now the metal has no protection whatsoever and is more so vulnerable to rust. So, I wouldnt leave the shell sitting this way for long. I would get it primered at least. I could be wrong, but so I have read!
EDIT - Have Kevin pop dents out as well ASAP! Without shiny paint, the dents should be easy to spot!