Today I received a very nice Model 20/26. Unfortunately, during shipping the box must have been dropped hard on the end, and the toe of the buttstock split. I have the piece that broke off, and when it is put in place there is only a very faint line to indicate where the break occurred. I would like to glue it back in place, but I would like to do so without damaging the finish on the buttstock.

What should I use for a glue, and what procedure should be followed to prevent damage to the finish?

Thanks for any help.