Just bought my pc and need to hear from all of you what's best as far as backing plates and pads. Which ones hold up best/ have the best velcro? Since I have 3 cars in the family... how many of each should I have on hand. Also what size pads are recommended and for that matter what size backing plate? Who has the best deals on all of this? Yes some swirls and scratches in 2 of the cars but not too bad. Many thanks in adavance!