Recommendations for anyone starting a similar project (in no particular order):
Make detailed drawings of panels prior to removing them, in particular the positions of any holes, such as the locating holes for the accelerator (gas!) peddle.
Don't be tempted to leave any traces of rust, you will regret it!
Don't trust the chemical rust inhibitors to passivate rust. The only proprietry chemical I have faith in is Jenolite, this does desolve rust, but may take many applications (possibly 20 or more) with wire brushing before the rust is fully etched out of any pores.
Take lots of photos, especially of wiring and brake pipe routing.
Keep everything straight and square, keep checking diagonals and use a long spirit level.
Use temporary angle iron braces to prevent the car from distorting as sections are removed.