Small update.
Got the primer on late last night, actually more like early morning :
, had a few problems with the primer drying really fast on the airbrush needle...i also had a spot of trouble supporting the model while i primed it.
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Noticed a lot of spots that are in need of a second coat and i had to remove a couple of runs in the primer where it seems i got it a little too thick. :-\
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On the whole tho it seems the primer has covered quite nicely, despite the few hiccups, also my AK stuff arrived today including light and heavy chipping solution....looking forwards to giving this stuff a go. ;D
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Right i'm off to order some retarder for my paints. 
Thanks for looking.
TTFN Matt