Hi Tony,
my pleasure bud, ile do one for you shortly.
Further to my comments re the galvanation or not re the Gibbons, i have been thinking about this and i actually dont think that the Govt at the time would have spent a great deal of time and money rustproofing these grens in any way. Certainly i dont think that they would have ever dipped the grens in molten zinc, ime not sure they would have used electrolysis, nor would i feel there have been much available by way of zinc paint available, could be wrong but lead based seems more likely. Nor do i feel that just because the info is in a book will i trust such info, i would rather see the proof, i.e, specific detailed info from the grenade specifications and this info is certainly not in the Govt specs i have in my hands. I think they were just painted blue, which has oxidised to green and the majority has worn off with use. Molten zinc would have been a bit thicker on the gren body and lasted a lot longer i feel. I would need to see the evidence that they were so plated and inference from a 'book' is not enough for me, especially as i have a gren with blue paint on it which i can see with my own eyes.
Andy