Yes, old aluminum foil can be repurposed for various uses. It can be recycled, used as a makeshift scrubber for cleaning, or as a reflector for grilling. You can also use it to cover food for storage or as a barrier in gardening to deter pests. However, it's important not to reuse foil that has held acidic or sugary foods, as it can corrode and release aluminum into the food. Always ensure the foil is clean and in good condition before repurposing.