Can I use aluminum foil facing to make a sandwich roll?

Yes, you can use aluminum foil to make a sandwich roll, but it's not recommended to use the shiny side facing outward. The dull side of the foil is typically used for food contact because it's less likely to transfer any potential residues or chemicals to the food. The shiny side may have a coating that isn't safe for direct food contact. Always ensure that the foil is food-safe and use it according to the manufacturer's instructions.