Rollup awning

Thus.... the reason to wash the awning with RV awning cleaner an not something like Spic n Span that cleans so well, it removes the protectant chemicals in the awning. RV awning cleaner will put those protectants back into the awning, thus prolonging it's life and give protection against UV.

Get some RV awning cleaner / conditioner and give the awning a good treatment.

A hail storm went through last summer and shredded our awning. Awning was rolled up, but it took a beating. (also damaged the roof and both AC units.)
All fixed now.
We decided to add the cover to the awning to help protect it. So far it has worked very well.
So we ended up with a new roof, 2 new AC unit, and a new awning. all is well now.
We looked at the plastic and aluminum covers for the awning, and went with the aluminum cover figuring it would hold up better than the plastic.

They have an option now where they add a 6-8" flexible metal extrusion for that first wrap to address this exact issue.

No Dave, Using rubber roof coating would not be a great choice. If you are having sun damage while parked at home, you could cover it with something. I have used those plastic rain gutters that you get from HD, or Menards. On mine, I put one edge in the awning rain gutter on top, and slide the rest right over the awning. It is a great fit, just snug, covers most of awning. They are cheap, I have 2 ten foot lengths.

Jerry