Now I am reading Scott Labs literature. They sell products with PVPP and casein, both of which are used to remove bitter phenols: Polycacel and Polycel. My local wine supply shop has several Scott products including Tannin Riche and maybe they have Polycel. According to Scott, the Polycel settles after a week and can be racked or filtered. Adding tannin is the easiest first step, I think.
Fred or anyone that would like to share the cost of Tannin Riche, I’m game. It looks like ordering may be limited to large quantities. I’m intrigued by your findings. I hadn’t thought of finishing tannins.