i used black hole last weekend , followed by megs 16 wax lovely finish
To be honest if you car is badly swirled it doesnt matter what wax or last step product you get , it wont look as good as machine polished swirl free black car.
The key is in the preparation, you can either try and fill the swirls with a glaze such as black hole or buy a machine , pads and polish and get rid of the swirls all together
think you need to have a good look around
www.detailingworld.co.uk