Hi Eric:
It would be helpful if you let us know your status...
At Q class, there's no way you can upgrade on the IAD-YVR-IAD segment since it's an AC operated flight (AC695/696?) and on the YVR-HKG-YVR (CP7/8), you can only upgrade using black stickers on CP and provided that you have Gold/ExecPlat status on CP.
Hope this helps...