As above.

So turns 3 and 4 I've plotted 'engineering' commands on my Pelta. Turn 3 I bank it and take the token. Start of turn 4, I spend that token to trigger "shields to maximum". Ships start activating over the course of the turn, regaining shields, and we finally come to the Pelta, who reveals his engineering command for turn 4.

Can I then use that engineering command to repair hull on the Pelta? Or...not, because I've already 'resolved an engineering command' that turn with the use of the token for the "shields to maximum" upgrade?

It does not.

As the card does not start with the Engineering Command symbol.

Ah, sorry, I could have sworn I'd posted this in the rules forum...

Anyway, thanks!