I would like to know what you all are using to get the black streaks from the roof,which occur on the outside walls of the camper,off. My 5er has the gel coat walls, and although I have been able to reduce the black stains to a point,I have never been able to get them off completely. Any advice you give will be appreciated, Thanks !!!
Rosie & Tommy
2017 Ford F350 Lariat Power Stoke DW
2013 Cruiser Patriot 305 SKP
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