[PaulProe]

Any fiberglass guru's here? I need to build up the edges of my exhaust cutout openings. They are cut in the wrong location.

What is the best way to make sure the buildup adheres to the edge. I know to use Tiger Hair which is glass reinforced, but I don't want the butt edge breaking a couple miles down the road.

Is a V-groove better or maybe a roughed-up generous cut-back on the inside so the bond area is about 1/2" or greater?

How do you keep the joint from cracking later?

Thanks

Paul