Phantom, you are correct you can clean the F4 Customs windshields with paper towels and any glass cleaner. They also shed rain due to the coatings that are baked in.
OK here is what you do. Hang that CB on the wall and get an F4 windshield and your worries are over. Spray Windex on your dusty windshield until the water runs down then clean it up with a paper towel. Rain runs off these windshields like water off a duck's back. I have the F4 14" tinted windshield and I love it. I can hear the radio and it block's the wind. It's the best money I ever spent. Try it, you won't be disappointed. Also the clearest windshield you will ever look through even with the tint. No problems seeing through it at night.