[urq] Did a rubber body plug go here - or does rust spread that much?

[steven j]

The rough hole  inside the 'trailing arm vestige pocket'.
 
http://pictureposter.audiworld.com/37382/rrrockerhole3.jpg
 
I'm going to have a body shop close up this hole - I didn't notice anything like this on the other side.  If there was a rubber body plug there originally - I'd like to tell the welder - although it may not make any difference.
 
Will sealing the hole accomplish much - the rocker must have some rust on the inside.  Does the whole rocker section get cut open and replaced?  The seam under the door strike is showing rust.
steve m

		
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