The MDLT and their coterie of volunteers did an excellent job. We drove out today to take a closer look. They didn't get all the paint off the rocks - but what they did was incredibly impressive.
We wanted to get out before it was painted again. It looks great. I wished that I'd brought a bag so I could pick up broken glass. Next time.
Here's the sign with the valley behind it.
Many thanks to Mojave Desert Land Trust and all the volunteers!