There is another way.(and it's relatively free)
Cutout a right angled triangle from a thick piece of paper, cereal box etc...
Wrap it around your cylindrical handle material.
Tape it in place so it slip fits around the handle.
Use a prick punch, awl, pin.. to poke through the cardboard and into the handle material at the edge of the spiral.
Index the tube around the handle and do each flute line in turn.
(have a look at a toilet paper roll, or paper towel tube for the general idea.)
You can vary the spiral by changing the shape of the triangle.