CX is now using the KLM lounge but I think that if you are in J and BA lounge is open, you should be allowed based on COT....not sure if you have a stop over before....

glad to hear there are some better wines...last time i was in the J lounge at YYZ they had two oceans wine..yuckity yuck yuck yuck....and a few other choices that i would not even cook with....