Is it possible to engrave on the backside of a mirror? If so, how do I do it?
There’s a search function at the top of every page. If you use it, you’ll find at least 27 different discussions on working with mirror, with a wealth of information.
Welcome to the forum. The short answer is yes. Another tip is to learn to reverse your image.
The forum includes many years of information and a robust search function. Your best bet is to become proficient at searching.