Adding to what Terry said, I have a 74 and I've learned several things about cleaning
1. Always test what ever you are going to clean with on what you're going to clean in an inconspicuous place. Time, chemistry and grime, can be an awesome mix and will take off things you don't want taken off. Gently does it.
2. The drapes can be laundered but you have to do so very gently. My wife rolls the hooks inside, lets them soak in a mild detergent solution, rinses and hangs to dry. This has gotten rid of the "rust stains" several times that appear over a period of time. You will need a supply of hooks etc as these get brittle and break off and you will have to replace some of them.
That's my two hints.
Sarge
