I did get the rear completely finished and two coats of "Rust Bullet" applied on both the inside and outside of that area. I am really happy with the Rust Bullet and plan to do the entire inside of the car from the front door back with it prior to installing the sound deadening material. I also got the electrical panel built for my Spot welder tonight after work. I think it may work, but we will see. I should get the arms and contact tips done tomorrow evening and maybe give it a test run.
Here are some shots from the work this weekend. First the front bulkhead panel piece tacked then welded in place, and my friend welding in the heater channel.





Here is what a weld looks like when you know what you are doing. Then the rear complete with "Rust Bullet", less seam sealer.



So I hope to get the spot welder done in time to weld in the front and rear aprons and hood seal strips. If it actually works in my testing I will add a timer so I can get consistent welds. Right now it is just hooked up to an electrical switch. I have two microwave transformers with the primary coils hooked up in parallel and the secondary coils hooked up in series to give me increased current. I removed the secondary windings and used 4 gauge welding cable to place three wraps around each coil. One transformer is sufficient to spot weld 20 gauge or higher metal. I'm hoping by having two transformers in series I can spot down to 16 gauge. It is all experimental at this point, but I only have about $50 invested in it, so it isn't a real big deal if it doesn't.