Every piece of woodworking be it furniture or other wooden objects will be damaged and require repair and restoration. So with that in mind, use a glue that will be friendly to whoever has to do the repairs in the future. And the only glue that will not make the restorationist curse a blue streak, is animal glue, hide glue, either hot or liquid or fish glue.
Here is a table that I am in the process of restoring that was originally glued together with hide glue, but was broken, as always happens and unfortunately repaired with modern glues, both white glue [PVC] and the cursed polyurethane foaming crap. A copy of an older style table it was made during the late nineteenth or early twentieth century in the revival style that was popular then. Had it been original it would have mortise and tenon construction, this one is dowelled together.
The above photograph shows the upright [upside-down] with the stretcher to the left. Remnants of the top of the leg are still attached and the yellow brown crap is poly glue that I began to scrape off. It was like removing fresh sponge cake from a plate with a fork, it was soft foamy crap that just didn’t stick. Touted for its gap filling properties this plastic material fills those gaps with hundreds of tiny bubbles, which in my book are voids or gaps
This photograph shows the leg with the remains of modern white and poly glue, both slathered on, little evidence of clamping and oozing out on the surface of the leg and on the upright support and no attempt to clean up the ooze out.
As you can see no attempt was made to clean the surface prior to the attempt at repairs and you can see both the white and brown residue that passes for glue.
The modern glues stick fresh broken wood together better [unfortunately] better than it did at the joint, but because it is not properly aligned nor clamped it will require that I take all apart, clean off the new glue and do a proper repair with animal glues.
In order to help remove the remaining pieces I used an insulin needle to inject vinegar into the joint and splits to soften the white glue. I used the small knife and larger glue scraper to remove the crap modern glues, it will require much more work than if proper glues and clamping techniques were used.
I will need to add new wood where the old wood is missing and also to the areas that are destroyed by using modern glues. Have I mentioned that I don’t like modern glues and there is a special place in hell for those that used modern materials for repairing antique furniture?
I will continue to curse until the repairs are completed and show the progress in future with expurgated blog posts.