I've made enough cane right now with polymer clay that I can truthfully say, some of it is really bad!
So, here's what I do to make new cane from old cane.
It's easy, and I often like the results far better than the original cane.
I pull out canes at random that I did not like or did not turn out well.
I cut this cane into segments to make it easier to work with in the new cane.
I begin to build my cane by using the segments pressed against each other. This cane will be round.
Cane is almost ready.
I added a layer of black and reduced the new cane made from old cane.
And I like this much better!
Now, show me what you do with your old canes.