rear quarter panels - rust fix

Nismo:

That is the most informative post yet.

Thanks for your input, I really appreciate it.

Now my next question:

short strand kitty hair fibre glass or “metal bondo” (I’ve never heard of metal bondo before, where can I find this?)

http://www.oscarcontrols.com/centipede/bondo-272.gif STUFF LIKE THAT
http://www.evercoat.com/imgs/products/Kitty%20Hair.jpg
http://www.evercoat.com/imgs/products/Metal2Metal.jpg

negative not JB weld…there is an automotive glue that holds just as good as a weld…and 3/4 of your car is glued together anyways you just have to glue it right so moisture doesnt get trapped in it…same with welding!