Does insert removes easy without risk to ruin it ? I assume it's glued?
Just ordered Prussian blue acrylic paint, 6000 sandpaper. And I will try to brass the bezel too...
The insert is not glued form the factory no risk if you gently remove it is plastic not Bakelite ...
On the back there is a black paint you have to reach the bare/naked transparent plastic than apply some layer of blue color in two o tree step.
If the result don like you you can restart from the beginning .