The absorber works wonders! It's bout 10 bucks, lasts forever, and does not streak!
http://www.absorber.com/
I use towels on the bottom of the car so I don't get the absorber dirty.
If you want wax, I really like Mothers carnuba cleaner wax paste, its great! If you want to spend some time, they also have a 3 step liquid wax system (cleaner, seal and glaze, wax), its amazingly good, but takes a lot of time, like waxing your car 3 times. I applied it to my 72 Challenger, the is car garaged and covered, driven on some nice summer days, and the wax is still on there after a year and a half! Just take the cover off, wipe off the dust, and your good to go!