Can't believe I never thought of using transparent images on top of the crate. Of course that would work (slaps self).
Okay, how about this for the logo:
Scene 1: Barrel stops moving, piston goes forward.
THEN, do a quick cut, do whatever it is you did to get the logo there (ie swapping texture packs)
Scene 2: Piston pulls back, the logo should now be there!
