They will have two a/c offline to be painted in full JQ
colours prior to the launch. Other a/c will have the QantasLink titles removed in the interim. Full paint may be applied where the schedule allows. This may not be until after the 3rd A320 has arrived.
The 717s will have two more rows of seats fitted. Word is still out on what they will do with the 117 seat a/c (as they can't put in 127 seats - 125 is the max!) and whether or not the TWA slimline seats will be fitted across the fleet. Would certainly help has the older seats are very thick and recline really far! Also IFE will not be fitted nor will the slimline leather seats going on the A320.
Source - Jetstar (Impulse) Employee Roadshow