What wax are you using, Glenn? How heavy did you apply it and how long did you let it dry? Have you ever used clay or a paint cleaner on the finish?

There are no shortcuts to getting a really great finish. I would recommend you wash and dry the car, give a good clay bar treatment to remove bonded surface contaminants (all the crud that sticks to the paint over time, making it feel a little rough to the touch) then go over it with even a mild paint cleaner - something like Meguiar's Deep Crystal Step 1 Paint Cleaner or SwirlX. Either of these will deeply clean the paint, remove any trace of wax, and properly prep the surface to accept wax. Either should be worked against the paint in small areas at a time and then wiped off before they dry. Always use a soft foam wax applicator pad when applying these types of products and a microfiber to remove them. Avoid terry cloth for the application process - terry cloth has some "bite" to it and you will be applying these with some elbow grease. That "bite" from the terry cloth has a tendency to haze the paint so stick with the foam wax applicator pad.

After that process you can apply your wax of choice. With all due respect to Andrew's suggestion to wax just a panel at a time and remove the damp wax immediately, that can get you into trouble with some wax products, especially on a black car. I would suggest you pick up some Meguiar's NXT Generation Tech Wax 2.0 and apply it in a very, very thin layer to all the painted surfaces of the car and then let it dry for an hour or more. Yes, an hour. This product contains some polishing oils and they need to fully set up before you remove it. If you try to take it off too soon, especially on a black car, you could end up with some temporary streaking. Just put it on crazy thin - thinner than you might think you can - and let it dry for a good long time. It will still wipe off very easily and the shine is fantastic.