I have a pc that i have been using with some no name 5.5" pads and I'm wondering if I go with some 4" LC pads, would it be smart to use the smaller pads on the big areas like doors and hoods. I know that sounds complicated and a grammatical a mess but basically I'm asking should I use a 4" pad over the entire car, or should I save them for more compact areas and stick with the 5.5" pads for the bigger areas.