Magnum Force wrote:I wont be throwing out the "frilly bit" as may come in useful for an inner arch repair which is needed.
The inner arch isn't the same shape as the outer one, instead of the double-curve it just has a flat edge. It's very close to the outer panel, hence quite difficult to get any rustproofing in, so it rusts from within.
Magnum Force wrote:A previous patch in an area of the inner arch that seems to be a favourite spot to go.
If I'm seeing correctly, that's where the rear seat belt lower mount strengthening panel is, at least on some cars. It's a flanged panel with a captive nut fixed to it, and the flanged edge nicely captures mud and rots it all away.
1972nail wrote:I believe that the hole was used on the production line to insert part of the body alignment jig prior to welding. the plates are there to plug the hole.
Didn't someone say that it's called a "Paint Access Panel" in the parts book? "Panel, paint access cover" is listed, but not against an illustration so cannot confirm.
It's main function seems to be to allow water from the road wheels to seep into the underfelt and take the floor out.