MadDoctor, what kind of buffer do you have? If you are buffing and still have swirl marks, it's one of two things. The polish your buffing with isn't aggressive enough, or the pad you are using isn't aggressive enough.
For example, I buffed my car with Optimum Polish (
http://www.optimumcarcare.com/optimumpolish.html) and a white buffing pad (minor cutting ability). When I finished buffing, there were still swirls. So I jumped to a more aggressive orange buffing pad. This got all of my swirls out. If it didn't, the next step would have been to go to a more aggressive polish/compound such as Optimum Compound (
http://www.optimumcarcare.com/optimum-compound.html).
Some cars have a very hard clear coat. A lot of people can just use the Optimum Polish and a white pad. I could not, my clear is way too hard.
Heres a nice list of the colored pads and their correction ability:
http://autogeek.net/lc-ccs-6inch-pads.html
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