First, if your persimmons are hard and astringent, they are not ripe. Wait for them to get soft
enough to fall off the tree before eating.
Second, you don't need to rub them on your face to prevent wrinkles -- just EAT them.
You may want to read this article on persimmons ...
Benefits of Persimmons
Here is a pertinent snippet ...
"Persimmons are rich in a number of vitamins, specifically vitamin A, beta-carotene, lutein, lycopene, and cryptoxanthin. These vitamins function as antioxidants in the body to reduce oxidative stress and prevent signs of premature aging, like wrinkles, age spots, Alzheimer’s disease, fatigue, loss of vision, muscles weakness, and a number of other conditions."