I was commenting on producing aluminium, that is in many cases a quite unnecessary thing.
On top aluminium is not a very good material when it comes to some things that has to do with boats.
The main reason why it’s used is the fact that it is a lot cheaper to fabricate things from than many other raw materials but can be sold at the same price or sometimes even higher.
Just as an example, masts, a wooden mast is out ruled by the fact that it is involving too much manual work to produce it, and you can not make a lot of profit selling it. Still I have the feeling that it can mach an alu spar in performance.