If I'm not making an air fryer gammon joint, I'm making my slow cooker gammon joint recipe insteadUse a sharp knife to remove the skin from the gammon joint, then score the thin layer of leftover fat in a diamond shape. This helps it to crisp up.! It's such a brilliant cut of meat because it's cheap to buy and works so well in both the slow cooker and air fryer. Let me know which method you prefer!