Very little diffence in any of the quality brands. Watch products that QUALITY body and paint shops use, especially those that do high end cars. Bet you will never find anyone of them using Glare or any of the other boutique products. 3M makes some excellent products, waxes etc, Mothers, Meguiars (Mirror Glaze) make some excellent commerical grade products. Rub it on straight, rub it on in a circle... main thing is to apply it with the correct applicator or mechanical polisher, applicators come in different grades, some even help to "cut" the surface, while others only apply the product and have no cuting capabilites at all, swirls mostly come from incorrect application and with todays advanced products the applicator is mostly the problem, If you don't know what to use call Max at Autogeek.com. He will not steer you wrong and makes his living selling and teaching how to use high end products.