[old Chevy guy]

Thanks for the link. Whatever you wanted to put inside there whether it be paint oil or whatever you need a way to get in there after its al welded up. I thought maybe one about halfway and another toward the back. Every one of these Ive ever had colected sand inside the rocker and rotted through from the inside out along the bottom. I think it find its way through the top between the spot welds where the door gasket sits.