I purchased my PC, along with an arsenal of pads and Pinnacle XMT polish about a year and a half ago. I have been experimenting with it off and on since I got it. It took me a while to really figure out what the PC is capable of.
At first, I was unsucessfull at correcting paint defects such as scratches. I mean it looked better, but I could not polish out the scratches. I used the XMT #3 with a yellow pad, and still couldn't correct all the scratches.
I figured out that I had to use the #3/yellow pad combo, turn the speed up to at 5-6, and really press down on the mofo. Break down the polish, wipe with a MF towel, and then repeat.
Once I mastered correcting the paint on my car is when the XMT #1/white pad combo played a major role in burnishing/polishing to a fine luster. It took some practice, but I have become really good with my PC/XMT/LC Pad combo.
The XMT is very easy to work with, produces awesome results with the PC, doesn't gouge the paint, little or no dust, and basically achieves the goal in mind...and that is to polish/correct the paint...and it does it very well.