Well, on one account this does not affect the utility of this unit - but specifically what is causing this lack of or failure of adhesion to the AL panel? Fifty years ago I was a research chemist developing synthetic polymers for this type of usage and what I am observing in these photos is probably poor application of the coating or maybe coating applied to a contaminated panel. It appears that the failure follows a parallel line across the top. I think you would be well served to request assistance from the original manufacture of the panel who applied the coating.
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2014 Flying Cloud 25FB
2018 Ram 2500; Cummins
Blue Ox WDH
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