You are using too much pressure. I use the same PC. I buy most of my detailing products from Adams Polishes and they have a great forum ( www.Adamsforums.com). There is some great info about detailing on there, especially info on the PC.
Best of luck...it just takes practice.
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2011 Roadster, Gun Metallic, Sport Package, Touring Package, Stillen G3 Cold Air Intake, Fast Intentions SS 18" Resonators CBE, H&R 20mm spacers, Stubby antenna, Z1 Hood Struts, Smart TOP.
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