Probably. Part of the problem is that many modern electrical insulation materials--in an effort to be eco-friendly--are made of soy derivatives. When such materials are used for wires in car engines, as they frequently are in Japanese cars, rats consider them dinner. I live in a rural area, and I've spent many $K on this problem.

Whether there's an equally "natural" material that rodents don't like is a question that should be researched.

They could put capsaicin in the insulation, if they cared.

That wouldn't help against Australian parrots but rodents are the clearly bigger problem, most places.

Parrots are immune to the pain effects of capsaicin because it doesn't attach to their receptors and many actually love eating hot peppers.

https://www.researchgate.net/post/How_did_birds_adapt_to_eat...

https://www.maddog357.com/parrots-peppers-no-sweat/

https://www.parrots.org/ask-an-expert/are-hot-peppers-good-f...

It is likely that the different perceptual capacities of mammals and birds is the actual reason why peppers produce capsaicin. They "want" their fruit eaten by birds, who will scatter the seeds widely, not by mammals who will not.

Probably that would require assembly workers to wear gloves. But perhaps they already do.

licorice data lines?