I was turning my first open ended end grain hollow form. It is a vase shape about 8” tall by 5” wide out of a nicely spalted piece of Birch. A crack opened up following one of the dark black spalt lines. The crack is now about 1/8” to 3/16” wide from top to bottom. I’ve read several posts about filling cracks with coffee, chalk or other powders. As I understand it the packing material is then filled with a coat of CA glue. Will this method work on a crack this wide? Do you tape over the inside of the crack to hold the fill material in place till the glue sets? I’ve never done this and am wondering how to hold the packing in place till it can be glued. Will it add any structural strength or is it merely a filler?
Bill