Wax for the RV
I have used ProtectAll for years and I'm very happy with it. It contains carnuba wax so it is a good protector and it's in liquid form so it's easy to apply. You spray on a small ammount and spread it around with a rag. Then you immediately buff the area with a dry cloth. You don't have to wait for it to dry and when it does dry it doesn't leave a powdery haze. That's why detailers love to use it. My friends with motorcycles swear by it. I use it on the RV, my vehicles, new appliances and everything you want to protect. They advertise that washing the rig is 60% easier with ProtectAll and I believe this is true based on my experience. Dirt and bugs just don't stick and they are easier to wash off. Black streaks may require a little elbow grease, but special products for black streaks are not needed.
You can get ProtectAll at Wal Mart in a 16 ounce pump spray or you can order it from Camping World in 1 gallon jugs. I get the gallon, share it with friends and we split the cost. By the way - it goes a long way so the bottle will last a long time.