Eric use a pale tone a Ivory/buff or pale blue/violet quite pale but airbrush it thinly. You may also consider mixing it with clear to make the effect subtler.
I found several thin coats made heavier where to accentuate between ribs and laterally across the wing crown quite pleasing.
Some A/C of course were glazed with a brown tint but I would *fade* the vibrancy of the lozenge a little using the above method before applying the tint in the same manner.
Some can get a good result with brushes, perhaps using oils? I've not tried that yet but I have used Acrylics wet brushed thinly over surfaces. Best bet is to experiment on scrap, even card. Just lozenge some up with scraps of off cut loz decals and play.