Outdoor Canopy Treatment

Is there something I can spray on the fabric of a swing seat canopy cover in order to protect it from the weather? The older canopy has turned green from the elements.
Thanks.
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Its likely mold from being in the shade and being dirty, bleach kills mold you could use a garden sprayer but rinse well as bleach is hard on fabric. The mold is likely growing on the what has fallen on the fabric.
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