Pettit Paint Propoxy Aerosol Spray Topside Paint Whisper Gray. Perfected single stage, two-part, acrylic urethane coating that cures to a high-gloss, durable finish. Stunning, long-lasting, buffable finish for exterior applications. Easy to apply and repair; offers outstanding flow-out, aesthetics, and durability. Cures quickly reducing contamination during application and shortens return to service times.