Having a problem with my RV fiberglass. Used TR3 as a cleaner and then Meguiars Yellow Wax (trailer is white). Washed it often with Meguiars Gold Class Car Wash. After a few years now have a dark grey color evolving that even solvent will not remove. Have found that Meguiars Paint Cleaner does remove most of it but need suggestions as to how to completely remove this discolored build up and then what wax product would be best to use that would not lead to my current problem in the future.
Thanks - paulie
Thanks - paulie