Ok I have a 38 foot hornet which we have on a seasonal lot. which I love. But we are in the shade, and the rubber roof is so gray. Is there any way to get rid of this. Also bought a used pontoon. Do not know where to go with this question. How do I get rid of the gray mold color on the vinyl seats.? It looks like it is embedded. they are supposed to be off white and look gray with spots. actually it looks like my rubber roof. any thoughts would be appreciated!