I rebuilt this without problem, but the front part has been the point of impact (the ship was without the deflector shield, my fault).

As you can see, the brick isn´t deformed, and it fit without problem, but has these stress marks. "Will the time cure her wounds" or Should I look for another brick?

Thanks!

Another brick. That stress crack will be throughout the thickness of the plastic of that discoloured area, and that doesnt disappear over time.

Well, I emailed to Lego for a new brick and they has answered me that they will send a new brick.

I will close this, since it appears to be resolved now.