gillhal

Hi all,
So I bought a 1979 fb RX-7 a few months back. After removing the body kit and taking a more in depth inspection I noticed several parts of the car that had completely rusted through. Along with that there's rust around the drainage holes of the boot and some rust on the back right of the roof and a few patches along both gutters. If anyone has expirience with repairing rust and could give me some pointers or some tips about how to get started and tackle this issue it would be much appreciated. The car has just been sitting in my garage as I just don't know where to start. Thanks for the help guys!
Btw I have started by striping the paint off some panels and grinding the rust off with a flap disc or wire brush and coating it with some rust converter