Wrap cloth around it, or coil a single thread around it, then coat with tar. Lots of organics will turn to “tar” if abused properly, even cooking oils. Also, steel will do instead of copper, you just need a few times a much of it.
On the other hand, is any of this really necessary ? If this civilization collapses, there’ll be enough ready-made materials lying around to last for a thousand years.
Wrap cloth around it, or coil a single thread around it, then coat with tar. Lots of organics will turn to “tar” if abused properly, even cooking oils. Also, steel will do instead of copper, you just need a few times a much of it.
On the other hand, is any of this really necessary ? If this civilization collapses, there’ll be enough ready-made materials lying around to last for a thousand years.