Jewelers Rouge is available at places like Wal-Mart I think or you could ask someone at an actual jewelers. It will take out the imperfections and clean without scratching. There is also a batting cloth for cleaning wheels that they sell at places like Checkers or Pep-boys (sorry don't remember the exact name). I used this on similar film on my 1950 and it cleaned up my side windows perfectly. The others were broken so I had to replace them.
