[bkozlow]

Paul,

What I would suggest is to use a V groove. If you can use on the back side and the front side 1/2-1 oz. fiberglass cloth. This cloth is like silk and is thick as tissue paper but very strong because of the weave. Even if you use a 1/2 strip across the gap, it will stop cracks from coming to the surface and cracking your paint. You want a very shallow film of filler over the cloth so that it is very near the surface when sanded smooth.

Bill k