Step 6: Open Files in Corel Draw, Layout, and Laser Cut
Be sure to check all settings, making sure you've got no fills, and just strokes that are set to either "hairline" or "1 pixel".
Send the document to the lasercutter and cut into your material of choice.
Vector cut your outlines into your material.
I'm using a heavy oaktag like material that will hold up for at least a few sprayings.
Cardboard works, as well as other plastics, and of course, the classic manilla folder.