Then there is the possibility that the beetles and their work are from long long ago- like before the tree was cut into a stock. I have a Japanese trainer that has wood that appears like wormy chestnut and in this case the stock appears oak-like. To my eye, it doesn't distract and actually I like it. Now keep in mind, there is no current "bug" activity (per powder dust). I like the freezing to to sanitize...for an active problem.