Take the palette knife and fill in any significant holes in the wall where you will mount the canvas. Remove with your knife and sand down any bumps or paint drips that might inhibit the mounting process or possibly damage your painting.
Measure the height and width of your canvas against the height and width of the exact area on the wall where you want your mural to be, so that you get an idea of how much wall space is filled, what placement looks best and if the canvas needs to be trimmed down. If you are using several canvases, do the same thing.
Remove the staples around the entire frame, using the staple remover. Remove the canvas from the frame extremely carefully so that you don't crack or disturb the art.
Cut off the edges with the staples using your scissors, measuring with a ruler so that the canvas is evenly trimmed down.
Lay out your cloth to catch any splattered adhesive. Extend the edges of cloth past the edges of your canvas.
Draw light lines at the midpoint of each measurement of your canvas from top to bottom and side to side; do the same thing for your wall. This will ensure even placement of your mural.
Connect the paint roller handle to your roller sleeve. Apply the adhesive to the back of your canvas, covering it evenly.
Line up the lines you drew in Step 6 and use the wallpaper brush to smooth down the canvas, pressing the side with the adhesive against the wall. Smooth the canvas down as evenly as possible, especially focusing on the edges. Allow to dry.