On Mon, 19 May 2014 18:31:11 -0700 (PDT), True North
wrote:

Some of y'all seem to be forgetting that a major contributing factor is the paint under the snaps.

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That is very unlikely. The paint blisters are a symptom not a cause.
Corrosion forms a white powder at the junction of the dissimilar
metals (Aluminum and SS), and that causes the paint to lift.