Thanks everyone.
Brett, like Tweakie said, that mirror was lasered from the back side. The image was flipped (mirrored) then the black areas in the original image had a deeper depth of cut in Z before I edited it to a feedrate. The slower the feed the whiter it is on the front because it burns the coating off. The faster the feed, the darker it is on the front and leaves the reflection. Did not have to do any scrubbing, just sprayed a very lite coat of clear paint to protect the back from getting rubbed off from touching it.
Jeff