Does wax prevent water spots?

The car wash deal is an ozone/water softening treatment thing. I'm not sure how it works but it removes the minerals and somehow causes the water to run off easier. you still need to stand by with a towel especially with a dark colored car. It's the sunshine on the water drops (along with minerals in non-softened water) that cause the spots by the magnification of heat through the curvature of the drop.