The phrase "real aluminum" refers to something that is made of actual or genuine aluminum metal. It implies that there might be other materials or objects that may look like aluminum but are not really made of aluminum. Full definition
The leather interior also includes heated front seats, real aluminum trim, and separate climate controls for the second row of seats. (kbb.com)
As you might expect, you can toss in some pretty fancy trim pieces made from real aluminum or ash wood. (cnet.com)
A new pattern has been introduced to decrease reflections and brighten dashboard surfaces, while high grade materials such as real aluminum and wood grain are applied to the center console. (thekoreancarblog.com)