Actually when I see swirls in paint, I smile with glee because it means that the paint can be significantly improved. It also means that there is room to teach the owner proper car care techniques to maintain that work.
A heavily swirled out black car is actually the most exciting type of car to work on because of the dramatic before and after.
Personally the article leaves out the most common causes of swirls. Poor washing/maintenance techniques--whether they are commercial car washes or poor washing/drying techniques at home.
Phil, while these articles are informative, how about sharing some written by yourself showcasing your own expertise? The most important reason being that the majority of those here in Detailing101 are not professional detailers..which these articles are aimed squarely at.
Just my 2 cents.
Richard