I used to have a 69 Nova Street Rod that was Black with Black Rims and Black interior that I used to show in the Cleveland area. The ony thing everyone asked me is how I made it look like glass and why they were no swirls. The trick I learned is to apply the wax by hand with an application pad going back and forth horizontal with the lines of the car. I would apply wax on the fender, then do move to the door and then go back to the fender and buff off. Then apply wax to the rear fender/quarter then buff off the door. When I buffed each part, I used the same horizontal movement. Hood, roof, rear deck, all the same way. Once the whole care was complete, I would let it remain in the shade for 15 minutes, then spray each part with Quick Detailer and swip off instantly with same horizontal motion. This seems to remove any inperfections left behind with the wax.
Once your do this a couple of times, your paint surface is conditioned to horizontal waxing and you never see wax lines.
It's also wise to wash the car first, dry it and used new clean towelsapplication pads with each step.
This process usually took me 3-4 hours but well worth the time once every couple of months.
Chuck