An epoxy patch isnâ€™t invisible, but it can keep a good board from becoming scrap.
If you want to salvage a knotty piece of wood to use in a project, the best way I’ve found is to fill the voids or stabilize loose knots with two-part epoxy.
Start by cleaning loose material and dirt out of the voids. This gives the epoxy a solid surface to bond with.
Next, mix up enough epoxy (the type sold in hardware stores works fine) to fill the void. To help the patch blend into the wood, color it by mixing in a small amount of sawdust from the same species. Pour the mixture into the void until it’s slightly over-filled (Photo, above). After the epoxy sets, sand it flush with the wood surface (Inset Photo, above).
Have a nice weekend,