Aluminum foil facing is best used for preparing food for freezing or frying by ensuring even heat distribution and maintaining food's moisture. For freezing, line your baking sheet with aluminum foil facing down to prevent sticking and make removal easier. When freezing individual portions, wrap them tightly in foil to protect their shape. For frying, use foil to create a barrier between the food and direct heat, which can help in even cooking. Always make sure the foil is shiny side out for better heat reflection and椋熷搧瀹夊叏. Remember to avoid overheating as aluminum foil can melt at high temperatures.