I've picked up two punctures on the tin top this week (hazard of driving onto building sites I guess!)
Just having a quick google, found this guide on the etyres site, which shows where punctures can be repaired:-
http://www.etyres.co.uk/images/etyres-tread-gauge.pdf
HTH
Mike
Just been out and checked the car. Not 2 but 4 punctures
Mike