Well I have a HB 777c2 that is about 4 yrs old. The screen had water spots and some kinda pattern from the neoprene cover that I use. I had this in my cleaning bucket and decided to use it, thinking that if I screwed up the screen I would test in small spot. Its called a " clay bar" and my brother got it at autozone. I worked on the screen for about 20 minutes, rubbing the clay bar on screen then wiping, rubbing some more then cleaning some more. This thing looks brand new. I will continue to use this product.
this information on the website says its safe on plastics.
The Facts About Using Clay Bar : Exterior Car Care


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. I will give it a whirl next cleaning or maybe tomorrow just to get the protectant on. I love it on the car.
















