I know this might be a silly question, but I was curious if Enhancement bonuses reduce the armor check penalty for shields and armor? For example, if my armor has an ACP of -5 and I give it a +2 enhancement bonus, does that mean the ACP becomes -3 instead?
Fighters with Armor training reduce Armor Check penalty.
The Masterwork property reduces it by 1.
Mithral reduces it by 3 (not cumulative with Masterwork).