This is what I use when I clean the roof and the awning. I've had to roll my awning up wet and it showed mold spots starting when I opened it. They weren't bad tho. It hadn't rolled up only a few days.
So it probably wasn't nearly as far along as what you are talking about. I don't know if this will take care of your mold problem or not.
If you try to buy any, you will have to call them. They only supply it in WI. stores and outlets.
1-800-276-8102