Android Armor exploit and other soaks


Does the android Armor exploit count as natural armor?

The android is plated with armor, giving it SOAK 5. The android’s weight is 200% normal instead of 150%, and it suffers a -1 penalty to its SPEED score.

Would this stack with any/some/none of the other soak exploit's?

Marine Tour
Battle scars. You’ve received so many battle scars that you sometimes don’t notice injury. You gain a natural SOAK bonus of 2.

Street Thug
Street tough. Life on the streets is tough. You gain a natural +2 SOAK.

Tough-as-nails. You gain a +2 natural SOAK bonus which stacks with any other SOAK scores you may have.