Once we stripped the body to bare metal, I found the car had taken a hit on the driver's side sometime in its previous life...the "bodymen" simply pulled out the area with a slide hammer, and then filled 'er up with concrete (very old, very hard bondo)...they didn't even bother to seal the holes they put in it, needless to say it was all cracking...I dug out about 1/2" to 3/4" of an inch, including the bondo inside the door on the pillar...looks like I'll need to replace that section.