I used clear contact paper to frost the sidelights beside our front door. The trick is to spray the window and the back of the contact paper with water before positioning onto the window. This helps to be able to slide and adjust it into place. Go to Plum Doodles for additional info and tips.:
http://plumdoodles.com/2012/05/23/add-priva...
I agree, Jeanette- that's why I decided to give this a try- not much to lose if you don't like it. :)