So back to the fender. You guys see any real reason to spray under coating on the back side? I mean there's a fender liner there so rocks and such won't hit it...I'll do a little towards the bottom by the side skirt for protection, but I think that'll probably be it. I'll do Peel N Seal on the wheel well liner whenever I get around to getting another roll, and at that point I can stick a small square on the backside of the fender to help kill vibrations, but I don't see the point for covering it with sound deadener.