Too abusive. Insane reward for little risk if you bust them out randomly.
I believe the Japanese system requires you to whisper to the judge how you will use ice car, if judges deem your use in the match to be too random, it's instant dq.
One of the most basic elements in any Jin matchup is punishing ice cars consistently. No ice car is safe on block, although A is lower risk, because many players expect/wait for the sword slash before punishing.