Wash and wax of a Toyota after supper tonite, slate gray. Sunny and hot here today, no shade, so what should I use. I know with the sun it will have to come off quickly. Should I use a carnuba, or a sealant. I have available, JW Acrylic Jett, FMJ, KSG,AW, Pink wax S100, NXT, liquid Souvern...