Hey Jefri,
It was a nice day here so I took advantage of it and did a little personal detailing. I see the other guys have given you some great information and now that I'm through for the day I thought I'd add just a bit more.
1. I did some digging and found a great video on YouTube my Mike Phillips. Mike takes you step by step from proper holding techniques to mounting pads and swirl removal.
[ame=http://www.youtube.com/watch?v=fxwlWijdIxM&feature=relmfu]YouTube - Part 2 - How to remove swirls, scratches and water spots using a Porter Cable 7424XP Polisher[/video]
Some use the Porter Cable 7424XP with a handle and some don't, I do not..
2. If you're using 6 1/2 inch pads this is part of the problem. I have the original
Porter Cable 7424 and in my opinion it's under powered and using 6 1/2 diameter pads makes it difficult to remove surface defects.
6 1/2 inch pads have 30% more surface area than 5 1/2 inch pads. That extra surface area combined with compound and the required pressure was just too much for this unit.
Substituting the 5 1/2 inch flat pads instead of the 6 1/2 inch pads was like someone gave this polisher steroids, literally. The performance of this machine was now incredible..
There's a sweet spot with this machine. If you don't apply enough pressure the pad won't spin properly and applying too much pressure can have the same result. If you switch to the 5 1/2 inch pads the window of operation will widen giving you more leeway to keep the process working properly.
3. When the pad isn't rotating it's still oscillating and performing work but not as efficiently as it would if it were rotating too.
4. Curves and complex shapes are a little more challenging but not all that bad. Using only a portion of the pad is acceptable. Occasionally I'll swap backing plates and use 4 inch diameter pads. It's too bad the smaller pads work so little area because the performance gain is impressive but it would take you forever to complete a job..
What kind of pads are you using? You mention 6 inch diameter pads but the
Lake Country pads show 6 1/2 inch unless your using the
Lake Country Kompressor pads.
Lake Country 5 1/2 inch pads.
Lake Country 5 1/2 x 7/8 inch Beveled Edge Pads 6 Pack, foam pad kit, build a kit, buffing pads, curved edge pads