Hi all: I am a 1st time RV owner. I have a Class C 2014 Itasca Spirit motorhome. We bought it used from a dealership in AZ and dove it up to AK. It had a nice shine to the exterior when we bought it, but when got home and I washed it with a pressure washer, I seemed to have stripped off the shine. I have since been scrubbing the exterior with a brush, and lightly spraying off the soap with the pressure washer. I really need help with how to wash it, what products work good for the fiberglass exterior, and whats good to polish it with. Thanks in advance.