In the past I've owned the very nice apple a1243 keyboard.
It would be nice to replicate that look, not necessarily through anodization, but simply with a transparent and protective layer which prevents the oxydation of the aluminium.
Painting aluminium is very complicated and it often ends up with a fragile finish. I wonder how the first released skb cases are doing...
Just to give an example, the first mountain bike frames had fragile coatings, while now the industry has gotten really better, I don't know if the use some primers or if they make a temperature controlled treatmen by heating the frame.
Anyway I've a very big fan of your project, I'm looking for a tkl is keyboard (not decided yet on the wkl or standard bottom row). Anyway, if you could include a pcb along with the case, that would be a nice effort.
Another question, how big is the bezel on the bottom and left side, measured from the keys?
thanks