Produce flame, OAs and blistering feint

[Firebug]

If I have produce flame already cast, can I use them to make an attack of opportunity?
Additionally, if I have the feat Blistering Feint, can I use produce flame's fire damage with the feat? (I would knock off a minute duration for both of these triggers).

Produce Flame:

Flames as bright as a torch appear in your open hand. The flames harm neither you nor your equipment.

In addition to providing illumination, the flames can be hurled or used to touch enemies. You can strike an opponent with a melee touch attack, dealing fire damage equal to 1d6 + 1 point per caster level (maximum +5). Alternatively, you can hurl the flames up to 120 feet as a thrown weapon. When doing so, you attack with a ranged touch attack (with no range penalty) and deal the same damage as with the melee attack. No sooner do you hurl the flames than a new set appears in your hand. Each attack you make reduces the remaining duration by 1 minute. If an attack reduces the remaining duration to 0 minutes or less, the spell ends after the attack resolves.

This spell does not function underwater.

Blistering Feint:

Benefit: You gain a +2 bonus on feint checks made while wielding a weapon that deals fire damage. Anytime you successfully feint a creature while using such a weapon, you may deal its fire damage to the enemy.

Basically, are you considered weilding the flames from produce flame.

[Claxon]

I think this works, but I would say that even when you successfully feint and get to deal damage it reduces the duration of the Produce Flame.