I have an 80-year-old piano that the previous owner tried to refinish. Some of the veneer on the top is bubbled up. I tried using an iron to stick it back down, but it didn’t help. I thought maybe injecting some glue into the bubbles with a syringe might help, but I’m open to any suggestions. The only other thing that occurred to me was to buy a sheet of veneer, peel off the entire mess, and fix it in one clean sweep.
If the veneer is just de-laminating, it’s possible to get it back down if you can get some glue back under the de-lamination. The original glue was probably hide glue so you can either use this or regular wood glue. Both are thermal reactive and will set and cure with heat from a regular household iron.
The other thing you have to consider is, if this one area has delaminated, how many other areas are weak or about to give up? If you think the latter might be true you should consider taking up the old veneer and replacing all of it with new.
Oakwood Veneer Tech Support