I wish my phone camera would let me show you my home made sanding mops AKA flutter wheels very simple to make .Usea3/8' 3" long bolt a couple of washers an a nut .Cut long 4",5" strips of cloth sandpaper to look like sticks of gum.A a slice on each end in the middle about an 1",Drill a 3/8's hole in the center of the strips.Put the washer on the bolt ,then a load all the strip of cloth sand paper on then another washer ,a nut tighten an there you go,use on a drill press or drill,I made a 60 grit one just in case i needed i needed heavy duty.Believe it or not i could not find my other ones and tryed it on my delicate fret work and it did a perfect job and didn't hurt a thing.i was amazed.