Sounds good to me. I use AG fast glass at the moment with a wo-wo cloth so will make suge it's clean before applying of course. Am currently waiting on some new wiper blades coming (aerotwin) that I ordered last week and haven't turned up yet so I'll need to chase them up as even 2nd class post should have turned up (at argos - click and collect from ebay) by now!
I think using gtechniq glass nano polish would probably be overkill in this case for just c2 but they do recommend it for applying their other glass rain repellent coatings.
Going to order some perfect glass cleaner on my upcoming CYC order as I can't see anywhere else that does it at a decent price, factoring in the delivery cost as well it's not worth ordering on it's own.