I don’t think getting the SS Wire is going to be hard and nor should getting the Polyimide insulator.
The main question here is how does the coating process work to insulate the wire with the Polyimaide?
I should have access to a 3D printer shortly and have a Lathe and Min Mill to make all the parts that I need for this process. If anyone can help me understand the process then I would be more than happy to try and make something to insulate the wire with Polyimide.
I think your just going to have to experiment with different ideas. I don't believe so far that we have any members here that have had experience working in a wire enamel coating.
My thoughts are picturing enamel buckets with pulleys mounted in the bottom that the wire travels through slowly to get dipped, then run a distance to air dry or heat dry, then respooled. Multiple dips (more dipping buckets in line?) for more layers are probably required. Sounds to me like a rig like that would take up an entire 2 car garage.
You can also look up nylon coated stainless steel fishing wire. Only problem is the smaller gauges aren't nylon coated. Not impossible to get.
Nate