BMW5541 (Barry) gives really good advice. The Blackfire kit has everything you need to make your baby shine for years to come, but it is really isn`t designed to remove anything more then light swirls (the Gloss Enhancing Polish will increase the shine by removing the fainest marks, but that`s it).

You will need a more aggressive polish to really cut into the visible swirl marks. You can do the Meguiar`s M105/M205, as well as consider Menzerna Power Finish. Menzerna Power Finish comes in consumer size, and has enough power to remove medium swirlmarks while leaving behind a really nice finish (following up with the Blackfire Gloss Enhancing Polish will be icing on the cake).