My Sub has the majority of the garage kept brown and white enamel paint! I had it professionally detailed by a shop I've observed do alot of used and new vehicles. The high gloss left after the first rain and it looked like it did before the detail job but without the ground in dirt. I was pissed because I thought the shop might have used a silicon product for a final shine. But I soon realized after clay bar, cleaner wax, then carnauba paste wax that the enamel GM used doesn't hold it's shine!! Don't get me wrong, to the average person the truck looks new, but after being used to keeping a black B/C,C/C caddy spotless for 10 years, the sub just doesn't hold it's shine. Anybody have any ideas short of silicone based products and re-clearing with some urethane???