I used a 3x6 mirror to create something that would fit into the night light rgb bases. I don't care for doing the acrylic, mainly because it doesn't like me either lol.. You can look at it from both sides to see the image. If you paint it, you can still see light coming through.
I do not like the acrylic used in the small rgb bases. Or rather, it doesn't like me. I really enjoy doing mirrors, and so my nightlight mirrors were born.
This was my first one on a 3x6 mirror and I love it.
All of the steps are on the attachment, which is a screen shot of all of my settings and the info.