Claying will only remove the contamination on the paint. It will make it smoother but will not be able to remove swirls. It is definitely an important step however.. before you move on to polishing.
You should be safe by using a polish once a year to remove fine swirls, and then washing a car in the right way so that hardly any marring or swirling appear again. Mild polishes wont be removing much of the clearcoat, its not as dangerous as it seems

... Also remember that any non-abrasive products will only fill the swirls instead of removing them, the swirls will thus reappear a couple of washes later. Here is a summarized thread by a pro-detailer on autopia.org that explains everything you need:
http://autopia.org/forum/car-detail...car-detailing/85532-since-others-posting-how-i-wash-cars-threads-here-mine.html
What I would do is polish once a year, and use a glaze every couple of months like 'ClearKote Red Moose Machine Glaze' to get a deep shine and fill the new swirls whenever they appear. The 'RMG' will also be a great base for a Carnauba wax, I recommend using Pinnacle Souveran Paste Wax, its the best for red and black Cars

.. Natty's Blue paste wax is also an option and its cheaper than Souveran..
Instead of the wax route, you can opt for a sealant. It would have a different type of look than a carnauba but would last much longer. Whatever you decide to do, a wax or sealant wont be enough for swirls. Your final look will depend on the way you prep you car (polish) for these last step products. The only abrasive products in the Zaino line are ZAIO (zaino's all in one product: polish/seal), and Z-PC (a mild abrasive polish). Make sure you check the guide on autopia, it is VERY helpful for beginners. Once your done, join the autopia forums and search for what you exactly need.. Ill be buying most of my stuff from
www.autogeek.net and
www.danase.com
Good luck, and dont forget to post pics!