Grey on 5er roof ???

I have seen them on mine and don't really know what it is. Mine seems to appear more in the shadows of the ac units or the maxx air covers. I use nothing but Wet & Forget on the roof. Its not instant gratification but it does work. As the directions say, it takes time but it also helps keep mildew and such off longer.

Mildew?

corvettekent wrote:
No idea but have you tried cleaning it off?

Why didn't I think of that, got most of it off, still wonder what it is as its never been there before, very good low tech solution.

Thanks

What Corvette do you have? I have a 73, 350 4 speed, rubber front bumper metal back bumper, only year they did that, 50K origional miles. Stock except for duel point dist., but keep the origional one to pass smog. Thanks again

No idea but have you tried cleaning it off?