Ron Wanttaja wrote
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"Scab patches"? I just bought one of the little 99 cent steel hole plugs
.....
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Wouldn't a steel plug used in an aluminum base be a potential source
of galvanic corrosion?
Hope there's plenty of paint between the dissimilar metals and better
yet, that the plugs are made of stainless steel or, at least, have
been passivated.

Regards,

Javier