It is really surprising to see so much rust in the seams, After reading this, it prompted me to have a poke about in the seams on my 84 shell and it's nowhere near as bad! wonder why the late shells are so bad!
I had the rust preventative methods in mind on mine from the start but wasn't sure which product to use for the best but I think now im going to use what you have used.
I hadn't thought about the idea of spraying the zinc primer into the seams like you have and have to say its a great idea and i'm going to follow suit.
I'm probably going to be selling my Mini when it is finished so would be nice to be able to show photos to prospective buyers and explain what I have done to prevent future rust as iexpect most buyers will worry about future rust, even on a fully restored car.
Thanks for the inspiration Pete and you are doing a brilliant job, can't wait for future updates. This is going to be one hell of a clean car!
Ben