Stains in my shower (from water and soap scum?) on the glass and metal?

I just moved to a new barracks room and I’d like to know how to remove water and soap scum stains from the glass and metal and what types of cleaner are best not to leave white crud.
http://img.photobucket.com/albums/v136/W… (On the metal)
http://img.photobucket.com/albums/v136/W… (On the glass)
http://img.photobucket.com/albums/v136/W… (Little spots all over the glass)

And what about that rust?