How do I remove a bathroom mirror that is glued to a wall?

We are redoing an older modular home and discovered that the mirrors in both bathrooms are glued to the walls! The edges of the mirrors are worn and showing black and we were hoping to replace them. If they cannot be removed without damaging the walls, any suggestions how we can work with them?
Didn't know if the edges could be painted to look like they're frames? Open to any suggestions!

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