I recently had a job requiring the use of stencil board. I had not previously used the material.
The purpose of this post is to call attention to this material which is available as a paper board, rather stiff and paintable and also mylar in varying thicknesses.
Both laser beautifully and enable you to offer custom stencils as part of your services. You may be way ahead of me on this but it seems like a painless way to add to your business.