I would have used tamiya XF-53 Neutral Grey..I think? I actually went looking for when I built this one earlier tonight... it was built in December 1993 and won a first place in the 1/48 Medium scale category in Adelaide in 1994....so it goes back quite a while!
Just catching up again Wayne. Beaut work mate. I haven't seen the second part of that magazine article yet, but I'm going into town on Friday, so I'll have a look for it, and send the stuff to you.