I have a problem with your statement. wood is wood. if I know glue it will soak into the rib. I don't see any reason to try and get this out. just remove what you can and when you put the new on, it will bond to the old. just move on, don't be a perfectionist. it might bite you. meaning, if you remove the surface of the rib to get the old hysol off, you will more then likely remove rib material. just leave it and install and recover with the hysol.