Aluminum foil is resistant to rusting, but it can still be damaged if not stored properly. To store aluminum foil, keep it in a cool, dry place away from direct sunlight. Use an airtight container or a resealable plastic bag to protect it from moisture and air, which can cause it to oxidize and lose its shine. Avoid stacking heavy items on top of it, as this can cause dents and tears. If you have a large amount, consider using a foil storage box with compartments to keep it organized and protected.