Lemon is a fruit that is loaded with Vitamin C and can be a great way to treat wrinkles naturally. You can turn the lemon juice into a mixture of many other ingredients that should give great results when applied to your skin, just like any natural skin product.
You can simply squeeze the lemon into your skin or more specifically on your face where the fine lines are, then massage it all over the fine lines. You can also mix the lemon juice with Vitamin E and some drops of almond oil. You can apply this mix into your skin, leave for a few minutes, and then wash it off with cold water. It is the acidic property of lemon juice that helps your skin to look brighter and should mitigate wrinkles.