Thank you for the praise and material suggestions. I spent yesterday looking for anodised aluminum sheet, and watching related engraving videos. I have yet to track down a local supplier of that as well, again wanting to avoid overseas online sources. I may anodise my own. I have been researching this process, as one of the milling projects I have in mind (when I can actually do so) is to make some roller shade hardware, and I plan to anodise it black.
As an aside. Once my Masso and CNC are reconnected, I plan test the Y axis splitter board I made. It may help those wanting to keep the 1F controller and adding a rotary axis (without having to switch cables etc…) - would require homing sensors which I assume the 1F controller can accept vs stall homing. Will post that adventure’s result once completed and tested.