That's unfortunately going to be a tough deal. If anything the whole Euro thing has made its partners Euro-skeptical.
I'm not sure you would convince Ireland, Portugal, Spain, Italy, Greece that more Europe is good for them considering how bad it has been so far. ( we have hurt you, sorry, just let me be in charge and everything will be good now )
For the rest of the countries, Germany has taken the image of dictator of Europe, meaning that more Europe means more Germany telling you how to live your life for Germany's pleasure. Of course that's BS, but Germany is the go-to scapegoat and as they don't campaign anywhere else than Germany, so no matter how true that is, that is going to stick in people memories for decades.