There are pretty much as many ways of covering pens with clay as there are pens out there. I usually create sheets, cover the pen barrel and gently repair the edge or add tiny slices to obscure it. The method in this tutorial actually makes a more free form but seamless design. I imagine if you smoosh the canes carefully it won’t pull away from the barrel. This would be a super way to show simple caning to students and make a cute, useful item.