R&R inner cowl panel

[qksilver]

I have stripped a 67 cab down to just metal. I need to replace the out rockers, no bug deal.
What concerns me is that both corners are rusted on the top part of the curve under where the fenders attach plus the both outer edges toward the doors about half way down.
Has anybody ever drilled out all the spot welds holding the inner cowl panel, cleaned under it, repaired it then spot welded it back.
The rest of the cab is so clean and this is a keeper, so i want to clean all the dirt etc out, strip and repaint/seal that area, fix the rust and reweld.
thanks,
Steve