I do some very intricate fret work cut with Flying Dutchman 0/3 spiral blades. I usse a sanding mop on everything to take care of fuzzies and to cut the edges. If you are talking about a rough interior cut, that is why I use spiral blades. by going gently back and forth, you can smooth out a rough cut. Hope this helps. I have heard that some people just use the spirals after cutting to act as "sand paper".