So a friend's fairly new Washburn suffered a nasty neck break a while back. His brother tried to fix it with some sort of glue (looks more like some sort of chalk filler tbh) and now it looks worse than ever.
The headstock and neck will no longer sit together due to the excess glue, so I'm looking for any advice as to what would be the best course of action. It's such a shame as there's not a mark on the guitar otherwise.
So far I've tried acetone and isopropyl alcohol to remove the glue, but neither seems to have much of an effect.
Any tips on how best to attempt a repair would be most welcome, cheers.