Yes, aluminum strips can be used to cover a wall damaged by water, but it's not the most effective solution. Aluminum strips are typically used for decorative purposes or as a protective layer in certain applications. For water-damaged walls, it's better to first address the underlying issue, such as fixing leaks or improving drainage. Then, repair the damaged area with appropriate materials like drywall or plaster, followed by painting or other finishing touches. Using aluminum strips without proper repair may lead to further damage or an unsightly appearance.