I thought that this was a pretty commonly known trick but I thought I would share it for anyone looking to make a grippy surface, especially on a polespear.
I use self amalgamating tape wrapped over a copper wire..the tape is amazing as it bonds with itself to form a solid rubber grip..it is friction and adhesive based so it never will come off unless it is pulled or scraped off.
I will add some pics later tonight to help explain the process.