Lawrence,
Welcome to the RV Forum!
We just got back to Eastern Canada from Central Florida and had bug splatters on the coach as well. It seems the key is to wash them off at the end of each day's travel before they bake on,
However, there are bug and tar removers sold in auto supply stores that are petroleum based, but I have been successful in first applying lots of water to re hydrate the splatters then applying some good quality car wash soap straight on a wah mitt. By rubbing with a mitt rather than a wash brush I find I can remove all remaining bug splatters.
If there is still some left, then after washing, clean the rest with a car polish that contains a mild abrasive. I like Meguire's for everything from the car, to the motorhome to shiny stuff around the house
Let us know how you make out.