I have been using the old Pinnacle claybars for years (the yellow ones) but they recently went to a less aggressive composition so I have decided to try out some new claybars. For my own cars I ordered some Sonus green since I don't ever let my paint get too contaminated but for customer cars I might need something a little more aggressive. It looks like CG has 3 different grades, white (light duty), blue (medium), and purple (heavy duty) is that correct? I think the white would be similar to Sonus green but does anyone have experience with their other clay? Any marring with the purple? Is the blue strong enough to remove most contaminants?