Second, I hope your brain overcomes your heart’s desires.
Panerai has had a history of making the same watch with a variation on a theme. Their worst executions were the composite case watches.
Applying a synergistic hard coating on an aluminum substrate is just a bad idea for a product that is going to get banged and knocked about on a wrist or dropped onto the floor.
The coating is designed to handle surface wear (abrasions, scratches, etc.). They are not suited for impacts.
Using aluminum as a substrate only makes the coating more susceptible to failure. When hit, the aluminum will yield (dent) and the zones where the coating is placed into tension will fracture. Once fractured, the substrate is exposed to gases or liquids.
Sergio points out the warning about alcohol. Alcohol* will oxidize the aluminum. The oxidized aluminum will swell and cause a failure zone at the coating boundary. In time, the coating can flake off.
*And a lot of other chemicals (salty sweat, chlorinated pool water and salt water).
If you have any more questions, I will try to answer. -John