I am getting ready to buy a Porter Cable Dual Action Buffer/Polisher and have a few questions. I have searched the forums and found a bunch of useful info, but I have a couple of specific questions left. First of all, what kinds of pads and tools do I need to operate the buffer to the best of its ability and where can I find the pads/tools at the best price. My car's finish has some water spot etching into the finish and quite a few swirl marks, so I plan on going over the entire car with Megs #83. This will not hurt anything will it? I think the eching/water spots are too bad for Megs #9. Also, I plan to use Megs #7 and #26 to finish the jobs, but what, if anything should I use before or between these applications. I have used a clay bar on parts of my car before, and I didn't see any improvement, so I would rather not go over the entire car during my detail process, unless it would be greatly beneficial. Also, which of these products can/should be applied with the Porter Cable? The more I can do with the machine would save me much needed time. Which pads should be used with which products and at what speed should I have the Porter Cable set on? Thanks for the help in advance!!!