Dave Emerson replies: Cracking or checking of wood often repairs well with the thinnest CA glue. I get it from Highland Woodworking in Atlanta, my best source for everything woodworking and good information. I order it in small size containers as it has a limited shelf life.
Where there’s open space, I work in sanding dust of the same wood, building it up and sanding with used sandpaper as I go—the sandpaper loads up quickly. Even black knots and bark can be made solid with the wood this way. And it’s very effective for fixing small areas of tear out from the planer. I sand it pretty well, but it finishes fine with my oil-urethane finish. Do wear protective gloves as it’s easy to stick your fingers together! But if the wood has an established checking pattern and is not completely dry, it will probably continue to check if subjected to additional drying like proximity to a wood stove.