To store aluminum coil properly, ensure a clean, dry, and well-ventilated environment. Keep the coil away from moisture and direct sunlight to prevent oxidation and discoloration. Store coils horizontally on wooden pallets or racks to avoid deformation. Maintain a consistent temperature and avoid extreme fluctuations. Use protective coverings or wrapping to shield the coil from dust and contaminants. Regularly inspect the coils for any signs of damage or corrosion and address any issues promptly.