Stencil on wood issue I have a board that I stained and poly’d and now am having trouble with the final step. I have script alphabet stencils and can’t seem to find a great way to use them.

I have stencil brushes and am using a dabbing technique. I tried taping them down but had really fuzzy edges. So then I tried spray adhesive and that did a pretty good job of solving the fuzziness, but it left a haze on the board where the glue was.

What technique should I be employing for this?
A combination of getting the right consistency of the paint for the stenciling and technique in the application should stop the fuzziness.

You would want a fairly "dry" paint thickness so it does not run when applied, more like paste than water. Keep the brush loaded with paint so you do not have to work repeatedly over the same areas but do not overload the brush with excess paint that will gum up and bleed under the stencil.

Then use careful light dabbing, possibly holding the stencil close to the surface with your fingers like Willeke said, moving in from edge to center to keep from lifting the stencils as you work. You should not need to glue down the stencils, but maybe use a little masking tape on the outer edges to keep them aligned.