First, go to Decorator's Best and order a sample or two of Imperial Trellis for $7 ea. I'd order a dark color on white so it's easier to trace.
While you are waiting for it to be delivered, go to A.C. Moore or the like and get a packet of stencils like these from StencilEase (I got 12x18 and you want at least that size):
Mine are 4 mil but if I hadn't been snowed in, I would've gone to Philly to Utrecht or Blick to get something a little bit thicker because this doesn't clean well without falling apart. If you get anything too much larger, it will likely be difficult to keep it from flopping around once some paint builds up on it and weighs it down.
You'll need an ultrafine permanent marker (Sharpie) to get started. I started by drawing in a 1/4-inch border around the stencil with a 1/2-inch border at the top for taping.
Once you have the wallpaper sample, lay the stencil blank over the wallpaper as shown. Make sure it's straight or your final product will run crooked. If you get a piece of wallpaper that doesn't show the entire pattern, copy it and tape it together to create a pattern based on the first photo in this post.
Click on the photos and save them in a folder. Print them out full size in landscape format mirror image.
Now cut out the pattern using an Exacto knife, leaving the lines within the dashes and the negative space like this:
Spray the back of the stencil with Repositionable Adhesive (available in spray or sponge applicator bottle) per instructions. Use blue painter's tape on sides and/or top as necessary to keep in position.
Place on the wall starting at the upper left corner. Use a level to ensure the sides are level (check your wall first to make sure; if not, adjust accordingly).
PLEASE NOTE: If you are using pearlescent or iridescent paint, touch-ups may be visible so you'll need to test which method of touchup of works best for you. Also, avoid painting over existing paint; in other words, carefully fill in the blank area only. I used a sable/synthetic Windsor & Newton No. 2 brush.
Keep carefully overlapping the pattern all the way down to the trim or bottom of the wall, checking to ensure the right side is level with each new stencil.
And eventually, it will look like this:
So, if you add up the cost of the paints, supplies and 2 visits to the chiropractor, it still doesn't add up to the cost of one roll of Imperial Trellis. Plus when you tire of it or sell your place, no one has to remove wallpaper. And you cannot put a price on the self-satisfaction of being awesome.
If you do take on this project, please leave a comment and send me a photo of the finished product.



































