Ok here it is, I need advice from the pros. I have a 2004 GMC Sierra HD in Carbon Metallic. The truck is parked outside as it doesn't fit in the garage. I wash/clean it at least weekly. I am looking to go beyond what I already know with detailing. I have read alot of manufacter's webpages but don't know what to believe. So what does everyone recommend for products for the dark metallic grey? I don't mind spending time on it, but I need it semi durable as it is parked outside. Any help would be greatly appreciated.