I'm not aware of guitar strings being coated with any chemicals and I suspect it wouldn't last long once in use. If you've been playing regularly for any length of time, you'll have callouses built up on the fingers which nothing will get through.
Enjoy playing but remember that while you're active, the body cannot devote that energy to healing. Guitar playing is a very physical activity as well as mentally stimulating which requires a great deal of energy. Healing is also an energetic process and if you try to do two high-energy activities at the same time, one or the other (or both) will suffer.