Nice one Vic, I really like the scheme. On the subject of seam filling, may I suggest that, rather than spraying multiple coats of primer and sanding back each coat (lots of paint and lots of work), use a small brush and paint over the seams with primer straight from the bottle. The thicker the primer is, the better as it will fill the seam much quicker than the thinned version needed for air-brushing. Plus you run less risk of filling seams that need to stay. The local primer build-up is easily removed with wet sanding.