How do you fire harden wood?

To fire harden wood, you need to expose it to heat, typically using a controlled flame, while keeping it at a safe distance to prevent it from igniting. Start by slowly passing the wood over an open flame or using a torch, ensuring an even heating that causes the surface to char slightly without burning through. This process creates a hardened outer layer, which enhances durability and resistance to decay. Finally, allow the wood to cool before using it to ensure it's properly cured.