I am spraying a 280Z in factory original Metallic Gold (no jambs). I want to spray HOK Metaljuls Pegan Gold on my last coat. this stuff is too expensive for the budget on this car. Can I mix 4oz of the Metaljuls in the first coat of clear or does it have to go on before the clear. I am hoping to get the painte effect with only 4 oz. I have used Metaljuls before, but as a topcoat before clear.