disArmoring and disBackpacking

[Shalewind]

Is it possible to strip off an opponent's armor or belongings during a grapple or a pin. Can eight small goblins grapple and deprieve a knight of his magical armor (even if it takes a few rounds) thus making him vulnerable to effects that the armor protects against? How about his backpack or other belongings? Any rules or cites on this?

 

[argo]

I would call a backpack a well-secured item meaning first you would have to grapple then pin then make a disarm with the opponent getting a +4 bonus

If You’re Pinning an Opponent
You can attempt to damage your opponent with an opposed grapple check, you can attempt to use your opponent’s weapon against him, or you can attempt to move the grapple (all described above). At your option, you can prevent a pinned opponent from speaking.
You can use a disarm action to remove or grab away a well secured object worn by a pinned opponent, but he gets a +4 bonus on his roll to resist your attempt (see Disarm).
You may voluntarily release a pinned character as a free action; if you do so, you are no longer considered to be grappling that character (and vice versa).
You can’t draw or use a weapon (against the pinned character or any other character), escape another’s grapple, retrieve a spell component, pin another character, or break another’s pin while you are pinning an opponent.

You can't strip an opponent of his armor unless he is helpless/unconscious.

Hope that helps.