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I saw another identical question about a strange metal roof valley with a metal cap installed over the valley. Although I didn't take a picture of the valley underneath, after taking off the cap and cleaning all of the debris out that the cap held in, there was a couple of rusted places on the valley flashing. I would like to remove the cap, blow out all the dirt, mud, and junk from underneath the panels and seal them down to the valley flashing. Would that work?
Valley cap
11/5/2023