I picked up the PC 7336 at lowes in December when it was only $50. I figured I'd use it this weekend to wax my car. I wash and wax regularly...so I don't need to use any agressive pads and cleaners...just want to apply the wax quicker. Anyway, do I need a backing plate, or can I just go out and buy some 6" pads? I haven't taken it out of the box and no absolutely nothing about the PC.