There is no question, spiral blades produce a lot more fuzzies. I'm with Judy, I use my sanding mop (220 grit) and support the piece with my hand. Sharp reverse blades help, as do stack cutting (which you probably already do with fragile fretwork).
I have never used a torch. I don't like open flame around all the wood dust in the shop. Plus I would probably set my work piece on fire and bust it all to pieces putting it out.
The very best way for me is gluing 220 sandpaper onto different shaped popsicle sticks. Steve's idea. It can be a bit tedious, but it is the most effective with the least chance of breaking the fragile piece you just spent so much time making.
Barry