Now that I got the entire tail assembly put on, I took it off today. I have to work on all the fairings. I did notice a white streak down the side of the tailcone. I don't what it was. Perhaps from a roof leak? Anyway it looks like it might be corrosive so I'll use some of the California green anti corrosion stuff on it, then buff it out with NuVite when it warms up. I will also be washing and polishing all of the tail assembly before reinstalling.