Stop in for a cup of coffee

71GSSDemon said
So, there is an unknown film on the windows of the Demon, likely due to sitting for 35+ years. Any thoughts on something safe to use to remove it? You can feel it with your hand (Karl). Windex and straight alcohol doesnt cut it.

From high school chemistry class, the three basic solvents are water, alcohol, and mineral spirits (petroleum based solvents)...

One of those three should work....