Painted over frosted mirrors now I don’t know how to clean them up without ruining them.
Hard to say as we don’t know anything about the frosting but maybe a test with goofoff on a qtip. Is the glass really frosted or just a decal.
The orange Goof Off cleaner works really well at removing fresh paint. Just be careful not to get it on the painted wood. Isopropyl alcohol may work as well