A few nice aluminium cnc machining images I found:
Aluminum Parts to Anodize
Image by courtney johnston
Anodizing parts for the TC18 VFD Tube Clock www.vonnieda.org/tc18
Aluminum Mesh cover prior to anodizing
Image by courtney johnston
Anodizing parts for the TC18 VFD Tube Clock www.vonnieda.org/tc18