I went through that a few years ago when I thought I would spruce up the boat a bit by removing the old rails and varnishing them. Broke the first one in three pieces getting it off.I ordered an inch and a quarter thick teak plank, eight inches wide and eight feet long. Using the interior rails as a pattern, It was a simple matter to cut out new rails and round them with a router. After cleaning them up with a rasp and sand paper, a few coats of Cetol Marine and they look great! Much beefier and stronger than the originals. I fastened them the same as the originals. with new heavy SS screws, using the interior rails as backing,I had a inch and a quarter square by eight feet long piece left over so I made a very nice looking boat hook out of it. Teak would not be my choice for a boat hook, It is too heavy; but it is a beautiful piece of gear.