We have Winn MH, the style with decals (not full body paint - I wish...) No matter what I try to use to clean I can't get grey grunge to clean away from white fiberglass areas, it's like it is unde...
Try tilex once and get back to me, the bleach in it instantly removes all that with a brush, leaving a clean surface on fiberglass and the plastic on the roof. the result is dramatic.