Both the protective film and your surface should be clean and free of any dust, oils or grease. Slowly remove the protective film from its liner and place the top edge in position, then gently smooth from the top downward and outward to remove air bubbles. To remove any bubbles, you can use an application roller or even a credit card. You may use a squeegee, but take care not to stretch or scratch the film. If the piece to be applied is large, try removing only the top third or so of the film from the liner, apply the exposed media and smooth it into place. Then, slowly and carefully peel the backing away and smooth the remaining film into place. After the entire piece is applied, gently smooth the film down from the top and out to the edges, removing as many air bubbles as you can.