I have an 02 super duty. We live on a gravel road and our farm is down a gravel road. I noticed when I was washing the underside of the truck, huge amounts of mud,rocks,etc. collect just under the front bumper. I washed this off and noticed that the inside of the front bumper is starting to rust. What is the best thing I can do beside washing it out every day, to prevent this rust from getting any worse. Thanking you in advance, Trisha