How to straighten bent TD parts ??

Hello,
I just got a spaceship model today. It's a not-Victory class from B5. The problem with it is that when it was packed the vertical fin got both bent and slightly twisted. One of the lower fins is also slightly bent. Does anyone know how to unbend Transparent Detail material without breaking it ??

Thanks,
James

I heated it in hot water, that seems to have worked.

But now the TD material is NOT transparent.