I'm all for the pressure washers. The problem with a hose, is it doesn't get off all of the road grime, like loose tar, and gravel. So essentially, you're leaving small particles, of dirt and rocks. Now when you go to soap the car up with a sponge, you grind the dirt into the paint. With a pressure washer, almost all of the junk on the car is blasted off, and about it taking off the wax, I wax my car about every other time I wash it, there's plenty to go around.
I think Turtle Wax makes a "Spray Wax". It's not really a wax, persay, but it does offer some protection, and a very nice shine. It's also very easy to apply, and makes the car smell really nice /ubbthreads/images/graemlins/laugh.gif