Yes, you can use aluminum foil facing to make a potpourri sachet. Aluminum foil is a versatile material that can be cut into small squares or shapes and filled with dried flowers, herbs, and spices to create a fragrant sachet. Ensure the foil is clean and free from any oils or residues before use. Seal the edges of the foil to prevent the contents from spilling out. While it's not as breathable as fabric, it can still hold the scent and keep the potpourri fresh.