I Have some old fiberglass fused pattern planes that have wood bulkheads. GG has been the best glue I have found for gluing different types of surfaces together and the only type of glue that will work on one of them. Not sure what resin was originaly used to make the fuse but nothing wants to stick to this fuse except GG. After two decades of flying I'm pretty sure all the original releasing agents has been removed. Maybe not but I do clean the surfaces with acetone before gluing.