I've got the same problem at the top of the paint edge where it meets the roof. Apparently Winnebago (and others) do not apply the clear coat in a thick enough layer at the edges. It depends on the technique used in the manual application, rather than the uniformity of a robotic application as is done on your car.
My body shop said to clean the affected areas and remove any loose clear coat. Gently wet sand the remaining clear coat edges, Clean with alcohol and let dry.
He said to purchase a two-part clear coat product available at most auto part stores. You puncture the bottom of the spray can, shake, and apply. He said to try it. . . what could go wrong?
Or I can bring it to him for $$$$.