Yes, you can use aluminum foil facing to wrap vegetables before grilling or roasting. Aluminum foil is a common and versatile tool in cooking, especially for grilling and roasting. The reflective side of the foil can help in evenly distributing heat and retaining moisture, which is beneficial for cooking vegetables. It prevents them from drying out and allows them to cook evenly. However, ensure the foil does not come into direct contact with the heat source as it may cause the foil to tear or the vegetables to burn. Always monitor the cooking process to prevent any potential issues.