I would bend the top layer up as far as I could, this should let you get to the middle layer. I would not remove it if I didn't have to, as this is part of the support for the door post. If you have to remove it , then weld it back in, or fab a new one, it needs to be there. HTH
If you don't make mistakes. your not doing anything.
69 ss rs full custom camaro 98 ISCA grandchampion
69 ss rs bb camaro wifes driver
66 Elcamino 350/all dz parts,ac,windows,loaded,my driver
69 ss chevelle bb conv.fresh frame off
26 T sedan street rod