After oxidation removal what next if anything?

I originally bought ReJex for the boat as it was recommended for “lake stain”. Most definitely worked.
I found the product at Woodies RV in Edmonton. There they told me the staff was using it on their cars.
So I tried it on the front of our fifth. A couple years ago I parked the trailer in the fall and did not get around to cleaning the bugs off the front.
In January we headed south. When we went through Salt Lake it was raining hard. The bugs all slid off.
I’m sold on ReJex.