New exterior paint flaking off
Not really a reply to your initial problem, David, but don't use a wire
brush to prepare a surface for painting.
It leaves a metallic film embedded into the underlying paint, which
will make things much, much worse: I once used it ahead of
eggshell-gloss, and the new pain just wouldn't 'stick' -- like painting
on Teflon.
I had to strip right back to bare wood ...
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