I'm starting to redo a 1915 [near as we can figure] Morris and have run into something that I would appreciate suggestions on. Apparently the old gent that had this canoe used red lead primer on the interior. Even using Methylene Cloride stripper is not removing it all. Particularly between the ribs and !/2 ribs from the planking. It also seems to have soaked into the ribs. Acetone does take it off, with an inordinate amount of scrubing -but not too well between the ribs. Any suggestions will be appreciated. Thanks! Denis