Car Wars The Card Game: Fireproof Armor

[PBarone714]

In our game, my opponent already took damage to his tires from a flamethrower card. I later tried to play another flamethrower card. My opponent then showed that he wanted to play the Fireproof Armor card. The first sentence of the Fireproof Armor card says “Play at any time, up until you have taken damage from a Flamethrower card.” My opponent claims that he can block my Flamethrower attack because he’s playing the Fireproof Armor card immediately after my Flamethrower attack.

I believe that because my opponent already was attacked by my Flamethrower, that he can’t play any Fireproof Armor cards for the rest of the game.

Please tell us how we should interpret this rule.