a6k wrote:
I cannot verify this but I was told that Rain-X chemically scores the glass. It works quite well on a car windshield but I agree with all those who say not to put it on a camera lens (or any other product).
As for protecting the view screen you may want to check out Rejex which I have used with no problems on plexiglass. It is fabulous for shedding bugs, rain, etc. But it was not designed, as far as I know, for camera screens, etc. Beware.
It may be more reliable to research a product online as opposed to seeking opinions on a forum. Plenty of articles on RainX performance. Just a thought.