First topic message reminder :
Having had 7 new Honda scooters since 1990----all, as they aged had the non shiney plastic start to turn lite/white with age.
I have tried various commercial products with varying success. None great, including WD 40----first rain and they all seem to wash off.
New discovery: fresh motor oil on rag, rubbed on works well and seems to last.
My bike after recent trip to NS----had dust, maybe salt spray from ocean, lot of fine powered dust from construction zones. Of course washed scooter----then gave the non-shiney plastic, including my near 20 year old GIVI box, the oily rag treatment...with fresh oil. Regular plastics get Lemon Pledge. At 36,000 miles bike looks fresh and new. Treatment did not cost much.