I use JB weld for a lot of things, has always worked well for me. One instance, about 30 years ago, I had an old Case pocket knife with the yellow plastic(?) handles that had disintegrated. A piece of making tape around one side the knife sticking up about 1/8 inch. Filled the channel with JB Weld, let set, and did the other side. After both sides set, sanded them smooth. Knife still sits on my workbench and is used almost daily.

Also, FYI.....JB Weld will take an alcohol based stain. I have repaired and replaced missing chunks out of rifle and pistol stocks with JB Weld and stained the area to make it blend in.
Recently repaired and stained a set of 1950's Colt Woodsman coltwood plastic grips that had a chunk missing. Used an alcohol based stain (Fiebing's leather dye) red and brown, to get close to the original color.

Also, Fiebing's leather dye works well on wood.