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A shadowbox is an enclosed glass front picture frame that is wide enough to hold and display items. You can purchase one at most craft stores, and you can choose any size that you prefer for your space. Make sure the frame you choose should is at least 1 inch (2.5cm) in depth in order to accommodate the LED lights you will use later. Make sure your shadowbox has a removable interior frame. You will use it to insert the LED lights between the glass panel and the mirror. Once you have the shadowbox frame you're going to use, turn it around so it's face down. You will see some small metal tabs around the perimeter. Move each one up and out of the way so you can remove the wooden backing of the frame. Then, remove the glass and set it aside. Remove the glass very carefully to avoid breaking it. Before applying the film, make sure your glass is clean. Spray it with glass cleaner and wipe it with a microfiber cloth. Turn it over and clean the other side as well. When you're finished, check that there is no dust or streaks on the glass. Complete your cleaning on a large flat surface, and rub gently to avoid breaking the glass. Grab one corner of the film and start to slowly remove the backing. If you do it too quickly, the film might tear. As you peel, wet the film with soapy water from a spray bottle. This will help to prevent the film from sticking to itself as you unpeel it. Before placing the film, spray your glass sheet with the soapy water. This will help to ensure a smooth application. Place the film over the glass, making sure it is centered. Then, use a credit card to smooth the film on the glass and squeeze out any creases and air pockets.
Purchase a wooden shadowbox frame at least 1 inch (2.5cm) in depth. Disassemble the shadowbox and remove the glass. Clean the glass and wipe it with a microfiber cloth. Peel the film and spray it with soapy water. Spray the glass with soapy water and apply the film to it.