Thanks Jeff I will take a look at the black units up there. What is the best method of treating the corrosion under those units? I wondered what those were. I think the unit on the door came off and that is where I saw the corrosion. What type of foam do you have, any idea? Here is the stuff I was looking at.
http://www.aircraftspruce.com/catalo...oofinstall.php
I figured while the interior is gutted now is the time to do this. I will take a look under the spots and let everyone know what there is.
BTW, thanks for the encouragement (spending the money)