To prevent damage to aluminum sheets during transportation or storage, follow these guidelines: 1) Use protective packaging such as bubble wrap or padded covers to prevent scratches and dents. 2) Store aluminum sheets in a dry, cool place away from moisture and direct sunlight to avoid corrosion. 3) Stack sheets with soft padding between them to prevent surface damage. 4) Securely strap or brace the sheets during transport to prevent movement and potential damage. 5) Handle aluminum sheets with clean, dry hands or use gloves to avoid leaving fingerprints or oils that can cause corrosion. 6) Ensure that transportation vehicles are clean and dry to prevent any contaminants from coming into contact with the aluminum. By adhering to these practices, you can minimize the risk of damage to aluminum sheets.