cheers fellas....
now, a report states the lower surfaces were Light Blue with no mention of the NMF.....the underside supposedly has the rear half of the wing in natural Metal and scrutiny of 2 images seem to show a hint of this, so i decided to run with it.
So plenty of Tamiya masking tape was applied to cover the "Lt.Blue" and I sprayed the Citadel/Warhammer Acrylic Mithril Silver to do the job....Primary Painting is complete!