What you'll need:
A printed out image
A Box Cutter
Hot Glue Gun
Duct tape (of course)
Also, my image is relatively simple, but if you want to use one with spereate objects, use this tutorial with mine.
Oh, and this is my first instructable, so be constructive, but not too harsh.
Step 1: Preparation
Print out whatever image you want to use, and tape it to the foam board.
Step 2: Cutting
Step 3: Sand and glue
Use your hot glue gun to make the inside of the stencil extra smooth. Draw a thick line, then use your tooth pick to spread smooth.
Also use tooth picks to reinforce any delicate parts, or parts the fell off while sanding. Youll notice I had to reattach part of my W.
Sorry for the blurry image.
Step 4: Test it out
Add a few layers of duct tape to the back for some padding
Hold the foam board extra tight to the peper
Use glue to make a thick line along the border to catch overspray.
Again, this is handmade, so there will always be some.