Faded OD look on bombers?

My method is to 'prime' with aluminum, mix in a drop or two of either flat white or flat yellow, thin to proper consistancy for spraying...but apply it very thinly. Once you get a light coverage stop. Let the paint cure and then take a fresh look at it. If is is too thin apply more. Paint not only fades but abraids from friction. You can do the same with painted on markings as well.