Before you start using spray cans to paint or prime any part of your car, you should know a few facts. Painting a car is a lot like building a house in that the whole thing is only as good as the foundation. There is no magical product that comes out of any spraycan that works nearly as well as a catalyzed, two part epoxy primer. It simply is not possible, regardless of what the catalog claims. If you choose to use something out of an aeresol can, it is NOT hardedned therefore it will dry "soft" and stay soft. Then when you go to spray your surfacer or sealer or paint, the solvents from those products will leach into the low-quality spray can product and will cause a whole bunch of problems like wrinkling or lifting, etc. Also, there is no need for any sort of "etching" primer these days with modern two-part primers. Just wipe it down with a bare-metal cleaner and spray. I'm not sure of exactly why you don't want to use your spray gun, but unless you enjoy stripping the car over when the paint fails, please realize it's the only way to get a high-quality job. I assume that's what you're after, since you're going to the trouble an expense of stripping the car to bare metal.
As far as what to use to remove the stripper, pressure washing ain't it! First off, spread out a drop cloth to contain the mess, brush on the stripper then I use steel wool (while wearing heavy rubber gloves) scrub the paint and stripper off. Yes it's messy, yes it's toxic (wear a respirator) and yes it's going to take a lot of time and a lot more stripper than you originally thought. When you get most of it off, use lacquer thinner to wipe off the residue (very, very important) and then sand the crevices by hand. If you can find a friend, you can do it in a day. Just rememeber NOT to get the stripper in crevices you can't get to, use duct tape to keep it out of the door jambs, trunk jambs and anywhere else you don't want to strip.
