I use a schlegel white wool pad, dont know a part number or anything off hand. i get them from a guy hat comes around on a truck. they have a real thick tuft of wool on em. They are the only ones ive ever used so i cant compare them to anything else. i have heard 3m makes a good pad to but they are pricey. i dont know what kind of pads would have come with your buffer but chances are its some nasty twisted wool and if it is, it could possibly leave some swirls that 106 ff cant take out.
when it comes to amount of product i generally use more with the wool than i do with the foam. today i did a tahoe and did the fender in two parts and used about an 8 inch line of polish where if it was foam and 106ff it would have only been about half as much. Also, maybe you already know this but it is a good idea to spur or clean wool very often, i often spur after each section i buff. hope this helps some. let me know how it goes.