In regards to the material it is most likely a fiberglass flex roof that has been coated with the wrong coating it has to be cleaned first. I used a solution of purple power from parts store mixed with sudsy ammonia took a garden sprayer, roof brush and scrubbed the roof several times until the dirt was gone. Keep garden hose with you to wash down side walls. I recoated with Dicor fiberglass roof coating. I used Dicor self leveling adhesives around vents. looks like new roof.
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