hi there ! from the metal war campaign it will be enough time to finish L...

Zapfhan: Hi  as you can read in the announcement article for the CW Event - Link"The Workshop will be available until the end of the period given to exchange Fame Points for reward bonuses, which is on July 30, 2020 at 10:00 (CEST)." Thus if your tank isn't finished until this time you will not get it.