Quoted from Pinballer22:Working on shopping out a JP and previous owner must have cleaned with freeze spray can upside down. Now there is this white film that is a pia to get off....going to buy some scrub brushes and hope for the best.
Anyone had similar issues in the past??
I believe that white film was applied at the factory in order to create an opaque look on the inserts (so the bare bulbs wouldn't show through).
Looks like someone in the past tried to remove the coating with something that caused the surrounding PF discoloration, got some of the coating off, but lost the battle and gave up.
I'm not 100% sure on this; just wanted to give you this head's up till someone can definitively chime in here.