Got some black buffalo horn and when sanding down the handle it has hollow spots in it. It happened right at the stop point so any more sanding would make the handle to small. Does anyone have a fix for this. I think its going to be an on going problem working with horn and bone, this is the 2nd time in about 4 horn handle knives. I am thinking super glue with black paint or epoxy mixed with black paint and just fill it in and hope. Thanks.