Can I use ‘«£RAIN X‘«ō on my BMWRT windshield and (or) my HJC helmet face shield?

The instructions on the bottle say, ‘«£Do not use on plastic unless pre-approved by the manufacture of the plastic to be treated‘«ō

In South Georgia, riding in the rain is sort of fun, (If like me, you try to see things the way a kid does).

But if the rain is hard enough to ‘«£drown a frog‘«ō then of course it becomes very difficult to see where you‘«÷re going.

I thought about using ‘«£Rain X‘«ō but I don‘«÷t want to ruin the windshield.

What are your thoughts?