I've got a 18 foot pro craft bass boat. It is silver and metallic blue. Problem is that it is getting a gray haze on the blue part, probably on the silver part too. What is best to use to remove this haze and then what should I use to prevent it from coming back? I polished it last year and put on turtle wax and buffed out. It looked great then but I noticed yesterday when I put the charger on the batteries that it had that haze back.