Read the statement by Michael Teeuw here.
UNSOLVED Can a "real" mirror be used if modified?
I’m wondering if I can take an old glass mirror and scrape off some of the backing and replace that area with the stick-on stuff so that I can make the size exactly to the dimensions of an old smart TV screen I have? What are the potential gotchas of doing this?
@mushu That may work but the problem is some of that stuff does not like to come off.
A better idea would be to do the same thing but just use a plain piece of glass.
@cowboysdude the thing is I already have a large hallway mirror someone gave me, so I thought I could add a couple of monitors behind it and make a nice magic mirror.