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Polishing an acrylic dome with a diamond cutter.
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Previously:
https://www.homemadetools.net/forum/...501#post122786
https://www.homemadetools.net/forum/...962#post119970
how? how does this work? - is it a diamond burnish? incredibly fine cut?
Diamond turning is a single-point turning technique that uses a diamond cutting tool to make extremely fine cuts. The surface roughness of the finished part is usually sub-micrometer, and can approach 3-4 nanometers with certain materials.
You can also do some pretty crazy things with it.
https://www.youtube.com/watch?v=MUgL9vnATF8