No, only the presence of oils or certain polymeric compounds will the water bead up. Claying is actually said to remove the stuff that causes water to bead (though in my limited experience I have not seen that myself).
That's why you wax it after you clay.
Order of complete detail.
-Wash with dish soap. Notice the great shine already? Well, dish soap is an abrasive, sort of. Don't be worried. It is however a degreaser, which means it will strip wax. Like a reset button. Along with old wax, it's great at road grime and the such. Don't use it after you detail, all that hard work will go away.
-Bring it in the shade and give it a complete clay treatment. It's therapeutic, IMO.
-You can go with Paint Cleaner if you like. Popular amongst the three step systems with labels like Meguire's and Mother's.
-Polish.
-Wax. If using a natural carnabua (sp?), wait until it's hardened. Depends on climate. In Arizona, this takes like 10 minutes. In the South, could take forever. As with any natural wax, always do in the shade.
-There are some nice synthetic stuff out there. Pick your poison. Some of synthetic stuff is great at being at polishing AND protecting, taking a step out of the process. I had a great polish that was the craze several years ago, and it actually encouraged direct sunlight. I forgot the name of that stuff, lol.
The best wax I have seen to date was a spray on thing. Looked too good to be true, but it wasn't. It's mail order only.