Just trying something out. I took an MDF circle and spray-painted it with Rustoleum Paint+Primer to give it kind of a gun-metal look. I taped it up, and had my GF drill the center hole and engrave the flourish. I left the tape on after cutting and gave the engraved portion a coat of metallic spray paint.
I would consider this a rough draft, but I like the effect. Thought I’d share.
Jack (not Christine)
Love the effect! 
it looks really cool. I initially thought it was a shot of the moon with the lunar mission flight paths highlighted (RIP Alan Bean). Thought it was a timely tribute.
But even with a second look, it’s still a neat clock.
Now there is a fantastic idea for a round deep engrave. Especially if one could find a gray scale elevation map
Almost looks like slate. 
Ooooo, that’s really pretty!
Nice test!
