sounds like your paint never cured properly.
I don't know if they use a clearcoat on MINIs or not, but maybe yours never got clearcoated.
i've noticed that the claybars leave little scratches but nothing that a light polish wouldn't fix( menzerna or the like) or Klasse AIO wouldnt fill in. of course my mini is light colored so that stuff doesn't show up as much as your dark blue would.
but i clay barred my black car this weekend and it didn't leave any larger scratches than were already there proir to polish:smile:
It sounds like you got a lemon of a paintjob.
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04/04 MCS LY/BK Prem,Sport,Cold 47000mi, 19%Promini pulley, Andy's HAI, Ian's auto-up, Alan's glove box organizer, 2 very happy drivers