I clay barred my F-250 and my FLH a couple months ago and they didn't come out so great. Not the claybar's fault, just too much time since anything was done to the finish. I used ultimate compound and then liquid wax (all Meguir's) on the bike and it came out awesome. I want to do the F-250, but it doesn't fit in the garage of my crappy rental duplex and there is no way I am going to spend 10 hours in the Central Texas sun doing it. Maybe I will go talk to the custom shop up the road and see if I can borrow some workspace for a day one weekend.