You have to be careful about permanent solutions such as frosting or tinting. We just bought new windows for a house at the beach and were told if we did tinting or frosting the bathroom window it would void the warranty. We have placed the cling material from Home Depot on our skylights with very good results, including one in the bathroom, so we placed the a frosted type cling to the new window. If you take your time and follow the directions it is not difficult to do.