The design is carved into a sheet of acrylic by the router and polished back to clarity with a succession of sandpaper grits. The wavy window is then ready to cast its hidden shadow.

I made an acrylic jenkins disk on a cnc some time ago, did not take very long to polish, but did not need to be grade A. Report comment. Reply. Pez says: March 9, 2019 at 12:04 pm ...