The more threads a buff has the stiffer it is. Basically the stiffer the buff the more it does for the compound. Also the less it distorts. So when you apply pressure to a loose buff it will flatten against the surface. A larger soft wheel will then cover the blade and go over the spine for example. This will soften edges with grease less (NOT GOOD). I use double threaded cotton with grease less 4" and 3 " dia. Denim is the same but stiffer. Sisal would be extreme with grease less I would think. I use the sisal with black polishing compound to bridge the gap between 400 grease less and polishing compounds. For awhile I had a hard time getting the scratches from grease less out with polishing compounds. I hope you kind of get what I am saying here. There are grits which give you scratches. The wheels apply those scratches according to how soft/hard they are. So many variables to choose from. If you have a limited amount of spindles those tapered ones are the thing to use. **You can also find straight 1/2" dia. spindles for those kind of wheels to replace the tapered ones.** You have to split up the type of wheels and grits you use to get the job done for the amount of buffs you can use. *ouch that's a lot of thinking* :<0) The felt buffs are the best but triple your cost. They are soft surface yet hold their shape under pressure. Hope I didn't confuse things more.
