How to sharpen a knife for preppers

This forum is heavily moderated to keep things valuable to as many people as possible. Full community policies are here. The basics:

• 1. Be nice to each other.
• 2. Stay focused on prepping.
• 3. Avoid politics, religion, and other arguments.
• 4. No unfounded conspiracies, fake news, etc.
• 5. Debate ideas, not people.