[Factory Guy]

The black stuff on the firewall for the most part scrapped off with a putty knife, when done, it was far from being clean, but it was so old and brittle it pretty much just scrapped off, now I have clean up the rest. Added Rust Oleum rusty metal primer to the "seem" that inevitably rusts on these Squares, and any other bit of surface rust, got the Rust Oleum rusty metal primer. The only spot that really had ANY rust was behind the AC box directly above the blend door opening. So I ground out the rust and applied some Rust Oleum rusty metal primer to that area as well. It was really a small spot. So now I will start sanding the rest and prep for paint.