I was not happy with the neatness of the previous fillets I created to help the glass conform to the transition from the deck to the vertical part of the coaming, so I tried making one from wood.
It was easy, quicker and neater.
I made a 45 degree cut along a short leftover strip to create a thin strip about 5mm x 5mm.
Because it was so thin it easily bent around the curves and I think looks fairly neat. In case it isn't obvious from the photo, the face of the thin strip running across the photo slopes at 45 degrees. I will sand it a bit to hollow the centre and produce a curve. It should sand more easily than epoxy goop.
I haven't glassed over it yet, but I think the glass will conform quite well.