Yes, powder coating aluminum is possible. Although aluminum and steel are both metals, they have different compositions. Therefore, they cannot be powder coated in the same way. Powder coating aluminum requires some special steps to achieve a perfect finish. First, the aluminum must be properly prepped. Afterward, a high-quality primer is used. Next, a primer surfacer must be applied. This surfacer will address any remaining defects in the aluminum surface and is also a key component in adhering the powder coating to the aluminum surface