Our 2017 Holiday Rambler Vacationer has a plastic film glued to the front I guess to reduce stone chips, however, mold has formed between the film and the paint. I've removed most of the plastic film but the GLUE is my biggest problem right now. I have several products I'm using but don't want to go too strong and strip the paint off. Interested if anyone has done this & what you used. Thanks in advance for any assistance.