One thing that bothers me is when people buy wrought iron to repel the faye. The point of wrought iron repelling the faye in the first place is that the act of turning raw iron into wrought iron anchors you in a materialist mindset, because you are making something that exclusively exists due to the labor you witnessed yourself put into it. Keeping that wrought iron with you reminds you that everything around you is a result of some sort of logisics chain or ecology, dispelling abstractions where the faye would creep in.
It couldn't be an essence / property of the wrought iron itself that could remain were you to give it to / recieve it from someone else. if it were, then surely the invention of plastic would've killed all the faye from the face of the earth. All life on earth has at least some microplastics in it that would make it poisonous to the faye if it worked like that, especially humans. The rain contains enough "wrought" substances that it's advised to distill / filter it before drinking, so every time it rains the water would be like sulfuric acid to the faye. If someone believed that to be true then why would they be bothering to carry around something to repel something that would surely be extinct?