I have the SATV hardcoat windshield on mine and was wondering if Plexus was a safe cleaner/polish (street bike guys seem to love it), so I sent SATV a note. Here's the response -
After looking at this product I will have to say that if you do, only do it for final cleaning. If you go out and get muddy you need to moderately spray down the windshield with the garden hose. Once the heavy dirt is off, we recommend a bucket of warm water with Dawn dishsoap. Once washed and rinsed then if you want to use the plastic cleaner for light dust and smudges it should be OK. But, officially we don't recommend anything but the soap and water.