About a week ago I oiled the most of the figs on my Chicago Hardy fig tree. Now all of those figs are purple and will probably be ripe soon. The figs that I didn't oil are all still green.

How does oiling work? Does the sun warm up the fig more with oil on it? Is it because the oil blocks air from hitting the eye?

And, will figs that have been oiled be as sweet and juicy as figs that are left to ripen on their own?

Joe