That silver stuff is most likely to protect the covered parts from the harmfull effects of the sun. Many parts that are made of plastic, rubber (or non metal) may deteriorate in the desert sun. I suppose they could have used a different color covering, but the silver probably reflects the sun better, and keeps the heat away as well. It was probably stored for several reasons, either they didn't find a customer right away, or the customer they did find didn't need it right away. As you know, demand for pax only 744s is slowing down, granted, this was in 1993, so who knows. Also, the picture was taken in 1993, so it may have been sold in that year, anyone know when RAM took delivery of this plane?