A few thoughts:
- In my opinion, Righteousness or Holy Touch allows one to "bless" objects and make them Holy anyway. I wouldn't even require a FP unless it was mid-scene and fighting a demon you say something like "I land next to my golf bag and pick up my four iron--good thing I blessed it--and swing at the demon..." ((Dogma, anyone?)) A maneuver would also work for that case.
- I think giving the ability to make anything a temporary Sword of the Cross reduces the narrative power the Swords bring to the table. Champions of God tend to be pretty FP-laden in my experience, and I expect a person with this power to more or less have a Sword of the Cross (minus All Creatures) on them at any time. And given that they can make mundane items into Holy Weapons, they don't have the issue of trying to carry a big ol' Sword around in broad daylight. Pretty much everyone knows when a Knight walks into a room if he's got a Sword on him...this person would throw off no such warning to others.
- True Aim, IMO, is rather powerful--particularly when the PC also activates Righteousness--and I'm not a big fan of it being a common power in my games, but that's me.
- That said, it seems more or less balanced.