I BF the wife's X5 a couple weeks ago came out great. It is a daily driver which is parked outside. Washed over the weekend and decided to put another layer of BF protectant on hood. Did it by hand using a terry applicator, the applicator looked like I used a cleaner or polish fair amount of dirt on the applicator. No complaints about BF but is there a difference between the polish and the protectant other than color?