Antiquing a Mirror?

You could try using lemon essential oil

This might help. It involves white vinegar and black spray paint.

https://www.remodelaholic.com/easy-diy-antique-mirror/

check this link for glass or mirrors antiquing https://justthatperfectpiece.com/spring-moss-mercury-glass-diy/

That's the silvering that makes glass a mirror. If you remove it all you'll have is messed up glass. Why not just start with clear glass? Small stand alone hardware stores that do window repair will cut you glass any size you need.

Try using a streight edge razor try paint stripper do small sections out side use gloves

I agree with Kelli. It's a pain to remove the gray paint, copper coating, and silvering. Best to buy clear glass. If you still want to try here you go

https://www.doityourself.com/stry/how-to-remove-backing-paint-on-a-mirror

It's a lot of work to remove the silvering backing on a mirror, it would be easier to get a piece of glass from a dollar store picture or a second hand store picture.

Hi Mary: Try this. It worked for me: To remove the silver coating from the back of a mirror after the grey or black paint has been removed, pour Lysol Toilet Bowl Cleaner that contains BLEACH (green bottle), let set for a few minutes until the liquid cleaner turns darker or bluish then rinse with water. Good luck

Hi Mary, hoping this helps you out,

https://www.youtube.com/watch?v=Q-GHTm3AXl0

It seems to me this will take more effort than it’s worth as it’s not really meant to come off. Start with clear glass and work your project forward.