I think that the underside of the roof can be sprayed pretty easily, I havent decided how I am going to do the underside of the AAR hood, but that is still a ways off. Here is what I got done today, removed some old urethane sealer, and used filler to cover the gap between the filler rod and the trunk edge. It came out pretty good, then I used the sealer to cover the edge where the trunk skin and the frame connect. Pretty much ready to shoot some DP on it after work tomorrow. Hope it comes out ok.