Frosted glass spray offers a simple, affordable way to gain more privacy. Follow these key tips to use it safely and effectively on your windows.

Since the door doesn’t have another window near it, I didn’t want to block out the light completely. I bought some frosted glass spray paint for under $5, and painted the outside of the windows.

The new Glass Smart Door by Feather River Doors uses an electrified fiberglass window to switch between clear and frosted modes for privacy. It also has a built-in Wi-Fi bridge to support one of ...