Mold in the cut marks, and work with a water jet cutting vendor like http://www.flowwaterjet.com/ to fine tune the cutting depth.
(disclaimer - I don’t truly know if this would work, but hey its a design forum)
Mold in the cut marks, and work with a water jet cutting vendor like http://www.flowwaterjet.com/ to fine tune the cutting depth.
(disclaimer - I don’t truly know if this would work, but hey its a design forum)