Complex Curve sandblast masks

Proof of concept cup cover, when finalized will extend entire height of cup to protect from blasting. As its a complex curved cup, the cup cover creates 'canvas' and separate design inserted in middle of canvas (with some light adhesive). Cover printed in 1/16th inch Taulman Alloy 910, and with a clamp as shown stays firm on substrate while blasting. Design printed in 1/48th inch Taulman Alloy 910. Blast result at http://www.grasshopper3d.com/photo/20171119-134806/next?context=album&albumId=2985220%3AAlbum%3A1850932