Question how does preferred enemy work against vehicles?

[manrogue]

He can re-roll the 1's to hit against both, but can only re-roll the 1's to wound against models with wounds.

So against Armour, he re-rolls 1's to hit and thats it.

And against models with wounds, he re-rolls 1's to hit and re-rolls 1's to wound.

To re-roll armour pens, he needs the tank hunter USR or something that specifies you can re-roll armour penetration rolls.

Hopefully that clears it up?