How to Frost Windows
To frost windows using static cling film, unroll the static cling on a clean work surface with the backing facing up. Next, draw your desired shape on the backing and cut the shape out. Then, fill a spray bottle with water, add a few drops of dish detergent, and spray it on the surface of the glass. Finally, peel away the backing, position the shape on the glass, and use your hands to press out the air bubbles, starting in the center and working out to edges.
Measure the glass surface to be covered.  Wash hands using soap and water to avoid transferring any dirt or oil to the cling.  Place the roll of cling on a clean work surface with the backing facing up. Draw desired shape on backing using your measurements, and cut it out with scissors or utility knife. Fill a spray bottle with water and add a few drops of dish detergent. Spray over entire surface of glass to be covered. Peel backing from cling film and position on glass. Use your hands to press out air bubbles, starting in the center of the window and working out to edges. Spray the front of the cling film with the soapy water and use a squeegee or plastic card, such as a credit card, to press out any small bubbles.  Remove film by wetting the surface with soapy water and peeling it off. The film can be returned to the original backing paper and stored for reuse later. If the film is not holding at the corners, use a hair dryer to warm the film until it is pliable, and hold it in place until it cools to room temperature and stays in place. Purchase clear/untinted acrylic glaze.  Use a foam brush to outline the window pane with a coat of glaze. Try to keep lines straight as this glaze shows brush strokes when it dries. Allow to dry and apply a second coat.  Remove glaze by sponging it with water and scraping it off with a plastic squeegee or old plastic credit card.  Purchase a roll of frosted self-adhesive shelf liner.  Wash the window glass and allow to dry.  Measure the surface to be covered, and cut the shelf line to the appropriate size.  Peel approximately 3 inches (7.6 cm) of the backing paper down and, beginning at the upper left corner, press the shelf liner firmly to the glass.  Work along the upper edge, smoothing out any wrinkles before peeling back another 3 inches (7.6.cm) of backing paper and smoothing that section down. Continue working in small sections until the entire surface is covered. Remove by lifting a corner and carefully peeling the liner off.  Remove window glass from frame, wash and allow to dry.  Rent a sandblaster and buy sand/grit from the rental store.  Protect the work area with heavy canvas drop cloths and don protective eye goggles, work gloves and face mask.  Place window glass in center of drop cloth and follow manufacturer's directions carefully to etch the entire surface of the glass.  Clean window glass of excess grit, and replace glass in window frame. Etching cream is not recommended for large surface areas because of its potentially toxic fumes. Acid washing is another method of etching glass, but it is best left to professionals due to the potentially toxic nature of the ingredients used in the process. Sandblasting, etching and acid washing are all permanent and cannot be reversed 
Measure the glass surface to be covered. Wash hands using soap and water to avoid transferring any dirt or oil to the cling. Place the roll of cling on a clean work surface with the backing facing up. Fill a spray bottle with water and add a few drops of dish detergent. Peel backing from cling film and position on glass. Spray the front of the cling film with the soapy water and use a squeegee or plastic card, such as a credit card, to press out any small bubbles. Remove film by wetting the surface with soapy water and peeling it off. Purchase clear/untinted acrylic glaze. Use a foam brush to outline the window pane with a coat of glaze. Allow to dry and apply a second coat. Remove glaze by sponging it with water and scraping it off with a plastic squeegee or old plastic credit card. Purchase a roll of frosted self-adhesive shelf liner. Wash the window glass and allow to dry. Measure the surface to be covered, and cut the shelf line to the appropriate size. Peel approximately 3 inches (7.6 cm) of the backing paper down and, beginning at the upper left corner, press the shelf liner firmly to the glass. Work along the upper edge, smoothing out any wrinkles before peeling back another 3 inches (7.6.cm) of backing paper and smoothing that section down. Remove by lifting a corner and carefully peeling the liner off. Remove window glass from frame, wash and allow to dry. Rent a sandblaster and buy sand/grit from the rental store. Protect the work area with heavy canvas drop cloths and don protective eye goggles, work gloves and face mask. Place window glass in center of drop cloth and follow manufacturer's directions carefully to etch the entire surface of the glass. Clean window glass of excess grit, and replace glass in window frame. 