Charles, thanks for the update. I have been using Evaporust for the last few months and agree it works wonders. I did my front coils in it, found the original grey paint stripe perfectly intact (they had not been painted black).
I am planning on doing my rear leafs next week with the same method. I just completed my driveshaft using the same technique as you described and was very happy with the results (one white, one pink stripe for for my C code SJ car).
Regards