In the last few weeks, I have been selling "homemade" pocket sticks out of guava. The problem I had was that the sticks themselves were rather smooth and didn't provide much of a grip.
I solved the problem by learning to tie a "Constrictor Knot".
Result. A great looking effective method. I've also used the knot to enhance the grip on my Mora knives.
UPDATE: the knots still seem to slip off whilst in heavy use. I've tried coating the knot with superglue. Stay tuned or results