Mix a cup of the lightest color (Dark yellow in this case) about 10 to 1, thinner to paint. lightly spray over your model and let dry, see if this pleases you, if not shoot it again until you're happy... you can even spray extra in areas where bleaching of the paint might have been more, like over the engines etc..
Just go light with it, let it dry, decide if you need more then spray again... it's always better for too little than too much with paint...