Mike,
From past expreiences IMRON is tough to work with,hard to repair and fumes are not good to breath. Also cost like hell. Don't get me wrong it is a strong and durable finish that nothing will hurt. Bur like I said hard to work with. Dupont or PPG are known quality paints, ask the painter which he prefers to work with. And as Stuart said above ask to see some of his past work and talk to the owners and see how happy they are with the work and the finish.
