Yes, you can use recycled aluminum scraps in your project instead of buying new aluminum sheets. Recycled aluminum is not only environmentally friendly but also cost-effective. It has similar properties to new aluminum, making it suitable for many applications. However, ensure the quality and purity of the recycled aluminum meet your project's requirements. Check for any impurities or inconsistencies that might affect the strength or performance of your final product. If the recycled aluminum is in good condition and appropriate for your needs, it can be a sustainable and economical choice.