I have also added this post to the "Finishes Forum" here at Permies.com as that should be its orgin locaiton. I would also ask that you share this link on Yakisugi (grilled cedar) ηΌγζ - Charring Wood as a Finishing Modality so we can keep similar information together on one page. That way folks doing research don't have to go to so many different postings to find information.