Interesting find in the desert. Rusty old cans nearly gone except for the ends. The end caps are possibly made of aluminum and will take many more years to erode away than the cans. Seems like the right place to put the message.
While vacationing in Nevada recently, I attended a light painting workshop with Dave Black. After some instruction and guidance, we were set loose to do our own thing. This is one of the images I came up with. The truck and foreground were lit with a pen light flashlight during a 15 second time exposure. Post processing in Light Room and Photoshop.