On a hairline crack you will likely not be able to open the crack to inject it. NO soaking with acetone or anything else. Here, carefully mask the crack, and continuously coat it with WEST epoxy with slow or extra slow hardener, over and over, wet on wet, until no more will soak in. Remove the tape and scrape off the excess before it completely cures.
I have a custom Mauser .458MW, also with a crack behind the tang.
This stock has an oil finish and the steel was kept oiled while it was in storage many years before I acquired it.
If I can't use acetone to flush and dry out the stock prior to applying the epoxy, what
do I use?
Thanks,
Ed