1. Take out your thrower.
2. As you're holding it, have a trap trigger Disjunction on you.
3. Once Disjunction wears off, it will regain its original durability, and will be fully repaired.
(You may need to wait at a tavern or re-log before it's fully fixed)
Just tried this in the trap in the "Dream Conspiracy", fixed mine up perfectly. The middle platform of Epic ADQ produces the same effect.
Here's a screenshot of the lever that will fix up your thrower (it's in the IQ quest, given by Graden in the manor):
I can't for the life of me recall who provided this information (someone in a General Discussion thread), but thank you to whoever it was! It will help those who have GS returners as novelty weapons...![]()