Depending on the desired height and width of each number, mark the plywood to size with the tape measure and pencil. You will need to stay within these marks to ensure the proper size for each number once it is tracked.
There are two ways to put your plywood on plywood, your method will depend on how sharp you want the numbers to be. You can print the numbers on paper and cut them out to create templates or free hand the numbers directly onto plywood. When handing out the numbers freely, it is advisable to use a roll of painter's tape or round objects (such as a bowl) 6" to 12" in diameter to create perfect circles.
When the numbers have been traced to the plywood, cut them out by guiding the puzzle along the traced outline.
Use sandpaper and the sanding block to smooth the edges of the cut out numbers.
In order for the moss sheet to adhere to the plywood, the surface of the plywood will need to be primed. With the numbers placed on the kraft paper roll, add the primer by holding the spray can eight inches from the surface of the numbers, then press the nozzle down in a controlled, even spurt.
After the primer is dry, use the can of spray adhesive to help the moss adhere to the plywood number. For proper coverage, hold the can eight inches from the bottom surface of the moss, then move back and forth in controlled, even streams.
Gather moss along the front and sides of the plywood numbers until all of the primed wood is covered in moss.
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Keep each number in its place along the exterior wall of the house. Use a drill to drive 2” wood screws directly through each number, keeping it firmly attached to the wall. Trim or patch moss to cover the screw heads.
To care for them, just spray them with water when they start to look dry.