| The Shaman |
I think it is possible. The text says that "the paladin's lay on hands ability also acts as remove curse," so it should function as a casting of the spell.
The DM has the final say, but eh, I'd say roll with it. Essentially, the spell itself says it does not remove the curse from cursed equipment but allows the victim to remove it - so essentially it removed the curse from the person and not the item, which fits the way the mercy feature is worded.