That's really not true. Anodised finish have huge variance in their scratch resistance. Only Type 3 hardcoard finish actually offer increased scratch resistance (this is usually achieved by running the acid bath at elevated temperatures. Regular room temperature Type 2 commercial anodising finish scratches very easily. On the other hand, powdercoating can also offer very durable finish, depending on which powder system you choose (as a point of comparison, Cerakote is a trademarked type of powdercoat that is quite often used on firearms and provide a durable surface that is relatively resistant to wear).Hmm I actually never heard that powder coating is sturdier than anodization, only that it is much cheaper than anodization. Powder coating is also able to achieve more consistent colors, but anodization is often much more resistant to scratches / pollutants when it comes to durability and less shiny in appearance (shinier = cheaper looking for alu imo).
Anyway, will be interested to see what you come up with in the future!
The blanket assertion that anodising is somehow better and more scratch resistant is completely untrue. It all depends on what type of anodised finish you're comparing against what type of powder coat