Platynum: Have you ever tried eating an unripe Papaya ? If you pick up a really green one and boil it with a pinch of salt , you can eat it as it tastes like a vegetable. Buying it unripe and storying it outside the refrigerator untill it ripens, it slows the mould growth like that on the photo. If you put an unripe store bought papaya in the refrigerator, it slows the ripening process and the mould growth as well.
I have tried rubbing cooking oil , gypsum powder when I bring from the store, but cannot get rid of the mould.