Thanks. The scratches are about the length and size of a hair, and some of them barely break the surface. These imperfections are only visible if you stand really close and are actually looking for them, but they are my pet peeve. Since all of the scratches are on the green surfaces (top 2/3 of motorhome is white, and the bottom 1/3 is green), the scratches show up as white because the green sections appear to have been painted over fiberglass or part of the white painted areas. I will give the air brush a try and will give it as many coats as necessary until the affected areas blend in well with the surrounding areas.