Can I use spray paint with my stencil?

Sure, why not? Just a few things to consider before you start.
First of all, in most cases spray paint is rather toxic. So if you do use spray paint with your stencils try to do the project outside or at least in a well ventilated area.  Shake the can well before spraying.

Another thing to remember: spray paint is liquid and tends to drip under the stencil when you sprayed a bit too much. It might be a good idea to use spray adhesive on the back of your stencil so it sticks to the surface. This should help to keep the paint from blowing under the edges of the stencil.
Also, it's very easy to spray too much paint on. Always start spraying before the stencil openings and move across the stencil evenly. Stop spraying after you've passed over the openings. This prevents paint dripping. Spray multiple lighter coats and gradually build up your coverage. You may want to mask the surrounding surfaces to prevent overspray.

And one last thing. Spray paints usually take longer to dry then regular house paints.

In general, we do not recommend using spray paint for interior stenciling, but it is definitely do-able!

Our phone#
201-828-9146