In the BA Vehicle Equipment section it says that if a Dreadnought is wielding 2 Blood Talons that they will follow the same rules as lightning claws, and that for every unsaved wound caused with a blood talon in close combat, the Dreadnought immediatly makes an additional attack.

So the question is: Since Lightning Claws let you re-roll to wound will the "Additional attacks" also follow the Lightning claw rule? Or would that only apply to the first set of attacks?

I would think they would allow you to keep re-rolling the wounds as long as you are able to keep making attacks.