I have been a contributor on other auto forums and have learned quite a bit from them.
I found this article on Audiworld a while back and it has served me well. It recommends products and procedures that I never would have thought to use.
As a result, I purchased a Porter Cable 7424 orbital buffer and found that it and some of the products I have learned about helped me keep swirl marks to a minimum and my cars looking like new.
I hope that this article
http://www.audiworld.com/tech/ext51.shtml is as valuable to you as it was to me.
Maybe there should be a new forum here that strictly deals with detailing.
By the way, the reason that I joined this forum was that I purchased an 08 G35 XS. This car will replace my Audi S4, but that is a totally different issue for another thread.