I have a 65 Skylark rag top. The top itself is in great condition. What I need is a good way to clean the grimy rear window. I have tried tons of cleaners. It appears to have a red mildew hue to it along with heavy clouding. And if anyone has good information on changing the headliner. Can the liner be done fairly easy, or am I better off taking it somewhere. Where is some good places to purchase such items. Thanks in advance.