I voted "a few times per year", but I would like to do it more often.
I use the Meguiar's 3 part system - cleaner/polish/wax. Hell of a lot of work too, since I do it by hand. I would say the results are very good to excellent.
Chicago, I sure would like a little more info about doing this with an orbital buffer. I have never used a orbital buffer before, probably because of the fear of going through the clear coat/paint if not careful, especially around edges. Well, with this black car of mine, I can see that I'm going to want to learn. So, how about some tips. Maybe even a full run-down procedure of how you do it in a separate post with an appropriate heading? Man, I sure would appreciate it. How about some recommendations as to what gear to buy. Can you recommend a decent buffer that's not too terribly expensive? How about pads? Is there different knaps or pad types that are better suited for this purpose, or is there a different type pad that's better suited to a newbie?
Seriously, I will take any and all helpful info with the full anticipation of going out and purchasing a buffer and all needed supplies. Maybe even this weekend...