billd91 said:
When he was charmed, did he go about sundering his own companions' weapons and shields? If that's his favorite tactic, I'd expect him to use it there. That might provoke a little more tactical flexibility on his part.
[hijack] That might be pushing it for a Charm result. The spell only makes you consider the caster a "best friend", it doesn't make you attack your friends.
Now, if the PC though that the best way to keep his fellow party members from hurting his "new best friend" was sundering their weapons, then so be it.
[/hijack]
Back to the OP's issue. The PC's weapon is an or double axe right? Isn't that wooden-hafted? Does making the weapon adamantine change that? As DM, you could rule that only weapons with a metal haft (eg, maces) or made completely out of metal (eg, swords) are treated as adamantine when opposing Sunder checks.
So an opponent with an adamantine dagger could sunder his axe pretty quickly.
Is this interp correct? It seems "logical" but it means that an adamantine longsword is a heck of a lot better than an adamantine battleaxe.
Even if it's a valid ruling, it'll REALLY tick off the player.
Given that, I think the best response would be to:
1. make sure you're using some non-sunderable opponents as other posters have mentioned.
2. Make sure that ALL of the players know that the 1/2 orc is detroying some valuable magic weapons
3. And sunder his axe once or twice just for kicks (make sure you do this TOTALLY by the rules tho! and only once or twice to minimze hard feelings)