Aluminum and steel are different substrates with different product and finish options. Selecting between them requires reviewing exposure, compatibility, appearance, and the proposed assembly. The material name alone does not establish coastal suitability.
What to do next
Compare the exact products and warranty documents for the address. Ask how fasteners, flashings, and accessories will remain compatible. A coastal recommendation should account for the complete system rather than treating the main panels as the only relevant material.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.