Sanctify Armor

Abjuration [good]
Level: Inquisitor * 4, Paladin * 3
Components: V, S
Casting Time: 1 Standard Action
Range: touch
Target: armor touched
Duration: 1 minute/level
Saving Throw: Will negates (harmless, object)
Spell Resistance: yes (harmless, object)
  You imbue your armor with a righteous aura. It gains a +1 Enhancement Bonus per four Caster Levels (maximum +5 at 20th level). When using your judgment or smite ability, you gain DR 5/evil.
  An outfit of regular clothing counts as armor that grants no AC bonus for the purpose of this spell.